Question: The George Walker Bush Highway forms part of what national highway in Ghana?

Context paragraphs:
Mallam Interchange: The Mallam Interchange is a dual carriage road system flyover in Accra in the Greater Accra Region of Ghana.  it is in greater accra.  It is part of the six-lane, 14 km George Walker Bush Highway funded by the United States' Millennium Challenge Corporation.

Apenkwa Interchange: The Apenkwa Interchange is a dual carriage road system flyover in Accra in the Greater Accra Region of Ghana.  It is part of the six-lane, 14 km George Walker Bush Highway constructed under the Millennium Challenge Account.

National Highway 544 (India): National Highway 544, commonly referred to as NH 544, ("old number" NH 47) is a 340 km highway connecting the city of Salem to Kochi city in southern India.  The highway runs through the states of Kerala and Tamil Nadu, connecting various important cities and towns such as Salem, Coimbatore, Palakkad, Thrissur and Kochi.  It is a spur of National Highway 44, which forms the North South Corridor of the National Highway network of India.It is passing south of coimbatore.  It was formerly designated National Highway 47.

G. H. Walker &amp; Co.: G.H. Walker & Co. was an investment banking and brokerage firm founded in 1900 by George Herbert Walker, grandfather and great-grandfather of Presidents George Herbert Walker Bush and George Walker Bush, and located at 1 Wall Street.

Mitchell Highway: The Mitchell Highway is a state highway located in the central and south western regions of Queensland and the northern and central western regions of New South Wales in Australia.  The Mitchell Highway forms part of the National Highway A32 corridor, which stretches from Sydney to Adelaide via Dubbo and Broken Hill.  The Mitchell Highway also forms part of the shortest route between Sydney and Darwin , via Bourke and Mount Isa; making it an important road link for the transport of passengers and freight for regional New South Wales and Queensland.

George Walker Bush Highway: The George Walker Bush Highway is a six-lane, 14 km highway in Accra in the Greater Accra Region of Ghana.  It is also known as the Mallam–Tetteh Quashie Highway as the highway links the urban town of Mallam to the Tetteh Quarshie Interchange.  The construction of the highway was financed by the Millennium Challenge Account.  The highway was officially opened to motorists on 15 February 2012 by President John Atta Mills.  The highway forms part of the N1 highway.

Karakoram Highway: The N-35 or National Highway 35 (Urdu: ‎ ), known more popularly as the Karakoram Highway (Urdu: ‎ ) and China-Pakistan Friendship Highway, is a 1300 km national highway in Pakistan which extends from Hasan Abdal in Punjab province of Pakistan to the Khunjerab Pass in Gilgit-Baltistan, where it crosses into China and becomes China National Highway 314.  The highway connects the Pakistani provinces of Punjab, Khyber Pakhtunkhwa and Gilgit-Baltistan with China's Xinjiang Uyghur Autonomous Region.  The highway is a popular tourist attraction, and is one of the highest paved roads in the world, passing through the Karakoram mountain range, at an elevation of 4714 m .  Due to its high elevation and the difficult conditions in which it was constructed, it is often referred to as the Eighth Wonder of the World.  The highway is also a part of the Asian Highway AH4.

N1 road (Ghana): The N1 or National Highway 1 is a national highway in Ghana that begins at the border with Ivory Coast at Elubo and runs through Sekondi-Takoradi, Cape Coast, Winneba, Accra and Tema to the border with Togo at Aflao.  It is the main highway along the coast of the country, with a total distance of 540 kilometers (335.5 miles).  The route runs through the Western, Central, Greater Accra and Volta regions of Ghana.

Dimples Interchange: The Dimples Interchange is a dual carriage road system flyover in Accra in the Greater Accra Region of Ghana.  It is part of the six-lane, 14 km George Walker Bush Highway built under the Millennium Challenge Account.

Roe Highway: Roe Highway is a 35 km limited-access highway and partial freeway in Perth, Western Australia, linking Kewdale with the city's north-eastern and south-western suburbs.  The northern terminus is at Reid Highway and Great Northern Highway in Middle Swan, and the southern terminus is at Kwinana Freeway in Bibra Lake.  Roe Highway, in addition to Reid Highway, form State Route 3, a partial ring road around the outer suburbs of the Perth metropolitan area.  Roe Highway also forms part of National Highway 94 from Great Eastern Highway Bypass to Great Eastern Highway, and National Highway 95 from Great Eastern Highway to Great Northern Highway.

Supporting paragraphs: George Walker Bush Highway N1 road (Ghana)
Answer: N1