Correct Option: B

Guwahati — formerly known as Pragjyotishpura and Durjoya in ancient Assam, and Gauhati in the modern era — is an ancient urban area, the largest city of Assam, the largest metropolitan area in northeastern, one of the fastest developing cities in India and often referred as “gateway” of the North East Region. It is also the third largest city in Eastern India after Kolkata and Patna respectively. The city is between the southern bank of the Brahmaputra river and the foothills of the Shillong plateau.