Which is the longest national highway in Bihar, with about 483 km in the state?

Correct answer: (a) NH 27, the East–West Corridor

Explanation

NH 27 runs from Porbandar (Gujarat) to Silchar (Assam). In Bihar it passes through Gopalganj, East Champaran, Muzaffarpur, Darbhanga, Supaul, Araria, Purnea and Kishanganj.