Question: Which of the following, Coiba or Nalanda, was an acclaimed "Mahavihara", a large Buddhist monastery in the ancient kingdom of Magadha ?
Context: Aruna Ratanagiri Buddhist Monastery (Harnham Buddhist Monastery) is a Theravada Buddhist monastery of the Thai Forest Tradition in Northumberland, England.  The community consists of monks, novices and postulants from a wide range of nationalities, usually numbering around eight Sangha members.  The monastery includes an adjacent lay retreat facility known as "Kusala House". Coiba is the largest island in Central America, with an area of 503 km2 , off the Pacific coast of the Panamanian province of Veraguas.  It is part of the Montijo District of that province. Nalanda was an acclaimed Mahavihara, a large Buddhist monastery in ancient Magadha (modern-day Bihar), India. Geden Sheddup Choikorling Monastery is a Tibetan Buddhist monastery in Elista, Republic of Kalmykia, Russia.  it was opened on October 5, 1996 in the presence of more than 30,000 people and is the first Tibetan Buddhist monastery to be built in the region since its beginning as an autonomous oblast in 1920.  The monastery also is the Republic's first Buddhist place of worship since Joseph Stalin ordered the destruction of all Buddhist temples and monasteries during the Collectivization era and the Great Purge in the 1930s. In addition to its use in a Christian context, abbot is a term used in English-speaking countries for a monk who holds the position of administrator of a Buddhist monastery or large Buddhist temple.  In Buddhist nunneries, the nun who holds the equivalent position is known in English as the abbess. Odantapuri (also called Odantapura or Uddandapura) was a Buddhist Mahavihara in what is now Bihar, India.  It was established by the Pala Emperor Gopala I in the 8th century.  It is considered the second oldest of India's Mahaviharas after Ancient Nalanda University and was situated in Magadha. Nalanda (IAST: "Nālandā " ; /naːlən̪d̪aː/ ) was an acclaimed "Mahavihara", a large Buddhist monastery in the ancient kingdom of Magadha (modern-day Bihar) in India.  The site is located about 95 km southeast of Patna near the town of Bihar Sharif, and was a centre of learning from the fifth century CE to  1200 CE .  It is a UNESCO World Heritage Site Ajahn Sucitto (Bhikkhu Sucitto, born 4 November 1949) is a British-born Theravada Buddhist monk ("ajahn" is the Thai rendition of ācārya [Sanskrit] "teacher").  He was, between 1992 and 2014, the abbot of Cittaviveka, Chithurst Buddhist Monastery.  He was born in London, and was ordained in Thailand in March 1976.  He returned to Britain in 1978 and took up training under Ajahn Sumedho at the Hampstead Buddhist Vihara.  In 1979 he was one of the small group of monks, led by Ajahn Sumedho, who established Cittaviveka, Chithurst Buddhist Monastery, in West Sussex.  In 1981 he was sent up to Northumberland to set up a small monastery in Harnham, which subsequently became Aruna Ratanagiri.  In 1984 he accompanied Ajahn Sumedho in establishing Amaravati Buddhist Monastery in Hertfordshire.  In 1992 he was appointed abbot of Cittaviveka.  On October 26, 2014, he resigned the post, but intends to continue teaching as before. The Anuradhapura Maha Viharaya was an important mahavihara or large Buddhist monastery for Theravada Buddhism in Sri Lanka.  It was founded by king Devanampiya Tissa of Anuradhapura (247–207 BCE) in his capital city of Anuradhapura.  The Mahavihara was the place where the Theravada Mahaviharan orthodoxy was established by monks such as Buddhaghosa (4th to 5th century CE) and Dhammapala who wrote commentaries on the Tipitaka and texts such as the Visuddhimagga which are central to Theravada Buddhist doctrine.  The monks living at the Mahavihara were referred to as Mahaviharavasins. Nava Nalanda Mahavihara was founded to develop as a centre of higher studies in Pali and Buddhism along the lines of ancient Nalanda Mahavihara.  From the beginning, the Institute functioned as a residential institution, with a limited number of Indian and foreign students.  In 2006, the Indian University Grants Commission accorded the Nava Nalanda Mahavihara the status of a "Deemed to be University."
Answer: Nalanda