The correct answer is: A. Dhubri and Goalpara
The Naranarayan Setu is a bridge over the Brahmaputra river in Assam, India. It connects the districts of Dhubri and Goalpara. The bridge was opened in 2011 and is the longest bridge in Assam. It is a four-lane bridge with a length of 2.9 kilometers. The bridge has been built to improve connectivity between the two districts and to boost economic development in the region.
Option B is incorrect because the Naranarayan Setu does not connect Bongaigaon and Dhubri. The two districts are connected by the Bogibeel Bridge.
Option C is incorrect because the Naranarayan Setu does not connect Bongaigaon and Goalpara. The two districts are connected by the Saraighat Bridge.
Option D is incorrect because the Naranarayan Setu does not connect Kokrajhar and Goalpara. The two districts are connected by the Kokrajhar Bridge.