Question: What Sharia-Compliant airline is the national flag carrier of Brunei Darussalam?

full_context: Document 1: Al Rayan Bank: Al Rayan Bank PLC (formerly known as Islamic Bank of Britain) is a commercial bank in the United Kingdom, established in August 2004 to offer Sharia compliant financial service products to customers of any faith. The bank has branches in London, Birmingham, Manchester and Leicester and agencies in Blackburn, Luton, Tooting, Wembley, Ilford, Bradford and Glasgow. It is the first British bank claiming to operate, in its entirety, according to Islamic principles. The bank welcomes people of all faiths and is becoming increasingly popular with non-Muslims, looking for an ethical alternative to conventional banks.
Document 2: Sriwijaya Air: Sriwijaya Air is an Indonesian airline based in Jakarta with its headquarters located at Soekarno-Hatta International Airport M1 Area in Tangerang, near Jakarta. Sriwijaya Air is the country's third largest carrier, operating a fleet of narrow-body aircraft and offers flights to various Indonesian destinations and a few international destinations. The airline is listed as a Category 1 airline by Indonesia's Civil Aviation Authority, the highest status that can be achieved for operational safety; by contrast, Airline Ratings's 2015 report saw the airline awarded just one out of seven stars for safety.
Document 3: Rayani Air: Rayani Air Sdn. Bhd. (doing business as Rayani Air; Jawi:"rayané 'ayr" راياني أير) was a full service airline in Malaysia, headquartered in Shah Alam, Selangor, in the Kuala Lumpur metropolitan area. It was the first Sharia-Compliant airline in Malaysia and the fourth such airline in the world, after Royal Brunei Airlines (RBA), Saudi Arabian Airlines and Iran Air. No alcoholic beverages or pork were served on board in accordance with Islamic dietary laws and prayers were recited before every flight.
Document 4: SN Brussels Airlines: SN Brussels Airlines (SNBA) was a national airline of Belgium, which mainly operated from Brussels Airport. SNBA was the trading name of the Belgian airline Delta Air Transport. SNBA was a full-service airline, connecting Brussels with the rest of Europe. It also flew to Africa, continuing Sabena's extensive network there. The airline merged with Virgin Express into Brussels Airlines which started operations on 25 March 2007 The airline had its head office in Airport Building 117 in Brussels Airport, Zaventem, near Brussels.
Document 5: Philippines AirAsia: Philippines AirAsia, Inc. (formerly Zest Airways, Inc. dba AirAsia Zest), is a low-cost airline based at Ninoy Aquino International Airport in Metro Manila in the Philippines. The airline is the Philippine affiliate of AirAsia, a low-cost airline based in Malaysia. The airline started as a joint venture between three Filipino investors and AirAsia Investments Ltd., a subsidiary of AirAsia Berhad.
Document 6: AirAsia: AirAsia Berhad () is a Malaysian low-cost airline headquartered near Kuala Lumpur, Malaysia. It is the largest airline in Malaysia by fleet size and destinations. AirAsia Group operates scheduled domestic and international flights to more than 165 destinations spanning 25 countries. Its main hub is klia2, the low-cost carrier terminal at Kuala Lumpur International Airport (KLIA) in Sepang, Selangor, Malaysia. Its affiliate airlines Thai AirAsia, Indonesia AirAsia, Philippines AirAsia, and AirAsia India have hubs in Don Mueang International Airport, Soekarno–Hatta International Airport, Ninoy Aquino International Airport, and Kempegowda International Airport respectively, while its sister airline, AirAsia X, focuses on long-haul routes. AirAsia's registered office is in Petaling Jaya, Selangor while its head office is at Kuala Lumpur International Airport.
Document 7: Monetary Authority of Brunei Darussalam: The Monetary Authority of Brunei Darussalam ("Autoriti Monetari Brunei Darussalam") is the Central bank of Brunei. It was established under the Autoriti Monetari Brunei Darussalam Order, 2010, and began operations on January 1, 2011. It succeeded the Brunei Currency and Monetary Board.
Document 8: Royal Brunei Airlines: Royal Brunei Airlines Sdn Bhd (Malay: "Penerbangan DiRaja Brunei" , Jawi: ڤنربڠن دراج بروني), or RB, is the national flag carrier airline of Brunei Darussalam, headquartered in the RB Plaza in Bandar Seri Begawan. It is wholly owned by the government of Brunei. Its hub is Brunei International Airport in Berakas, just to the north of Bandar Seri Begawan, the capital of Brunei.
Document 9: Brunei: Brunei ( , ), officially the Nation of Brunei, the Abode of Peace (Malay: "Negara Brunei Darussalam" , Jawi: نڬارا بروني دارالسلام‎ ), is a sovereign state located on the north coast of the island of Borneo in Southeast Asia. Apart from its coastline with the South China Sea, the country is completely surrounded by the Malaysian state of Sarawak. It is separated into two parts by the Sarawak district of Limbang. Brunei is the only sovereign state completely on the island of Borneo; the remainder of the island's territory is divided between the nations of Malaysia and Indonesia. Brunei's population was in .
Document 10: Malaysia Airlines: Malaysia Airlines Berhad (MAB) (Malay: "Penerbangan Malaysia Berhad" ), formerly known as Malaysian Airline System Berhad (MAS) (Malay: "Sistem Penerbangan Malaysia" ), branded as Malaysia Airlines, is a major airline operating flights from Kuala Lumpur International Airport and from secondary hubs in Kota Kinabalu and Kuching to destinations throughout Asia, Oceania and Europe. Malaysia Airlines is the flag carrier of Malaysia and a member of the oneworld airline alliance. The company's headquarters are located at Kuala Lumpur International Airport. In August 2014, the Malaysian government's sovereign wealth fund Khazanah Nasional—which then owned 69.37% of the airline—announced its intention to purchase remaining ownership from minority shareholders and de-list the airline from Malaysia's stock exchange, thereby renationalising the airline.
Document 11: Lion Air: PT Lion Mentari Airlines, operating as Lion Air, is an Indonesian low-cost airline. Based in Jakarta, Indonesia, Lion Air is the country's largest privately run airline, the second largest low-cost airline in Southeast Asia after AirAsia and the second largest airline of Indonesia, flying to more than 79 destinations in Indonesia, Singapore, Malaysia and Saudi Arabia, as well as charter routes to China, Hong Kong and Macau.
Document 12: Brunei River: The Brunei River is a river which flows through Brunei and empties into Brunei Bay towards the North-east direction. The Istana Nurul Iman, the official residence of the Sultan of Brunei, stands on its banks. The Brunei River is the shortest major river in Brunei Darussalam. Brunei Darussalam's traditional residential areas, Kampong Ayer (Water Village), is situated on the river. Bandar Seri Begawan, the capital of Brunei Darussalam, stands on its banks. The upper reaches of the river are an important source of freshwater for the western parts of the country.
Document 13: List of companies of Brunei: Brunei is a sovereign state located on the north coast of the island of Borneo in Southeast Asia. Apart from its coastline with the South China Sea, the country is completely surrounded by the state of Sarawak, Malaysia. It is separated into two parts by the Sarawak district of Limbang. Brunei is the only sovereign state completely on the island of Borneo; the remainder of the island's territory is divided between the nations of Malaysia and Indonesia. Brunei's population was 408,786 in July 2012.
Document 14: Brunei dollar: The Brunei dollar (Malay: "ringgit Brunei", currency code: "BND"), has been the currency of the Sultanate of Brunei since 1967. It is normally abbreviated with the dollar sign $, or alternatively B$ to distinguish it from other dollar-dominated currencies. It is divided into 100 "sen" (Malay) or "cents" (English). The Brunei dollar is issued by the Autoriti Monetari Brunei Darussalam (Monetary Authority of Brunei Darussalam).
Document 15: Shariah Board: A Sharia Board (also Shariah Supervisory Board, Advisory Board or Religious Board) certifies Islamic financial products as being Sharia-compliant (i.e. in accordance with Islamic law). Because compliance with shariah law is the underlying reason for the existence of Islamic finance, Islamic banks (and conventional banking institutions that offer Islamic banking products and services) should establish a Shariah Supervisory Board (SSB) to advise them on whether their products comply, and to ensure that their operations and activities comply with Shariah principles. There are also national sharia boards in many Muslim majority countries that regulate Islamic financial institutions nationwide.
ground_truth: Royal Brunei Airlines