The correct answer is: B. National Highway No. 84
National Highway 84 is a national highway in India. It runs from Chhapra in Bihar to Gopalganj in Bihar. The highway is 120.4Â km long. It is a two-lane highway.
National Highway 77 is a national highway in India. It runs from Varanasi in Uttar Pradesh to Sonargaon in Bangladesh. The highway is 380Â km long. It is a four-lane highway.
National Highway 85 is a national highway in India. It runs from Silchar in Assam to Agartala in Tripura. The highway is 431Â km long. It is a two-lane highway.
National Highway 80 is a national highway in India. It runs from Delhi in Delhi to Varanasi in Uttar Pradesh. The highway is 729Â km long. It is a four-lane highway.
Therefore, the correct answer is National Highway No. 84.