The correct answer is: A. Motipur
Motipur is a town and a notified area committee in East Champaran district in the Indian state of Bihar. It is located on the banks of the Burhi Gandak River, about 100 km from Patna, the state capital. Motipur is a major silk textile producing centre in Bihar. The town is home to a number of silk mills and weaving factories. The silk produced in Motipur is known for its high quality and is exported to various countries around the world.
Option B, Bajari, is a village in the East Champaran district of Bihar. It is located about 10 km from Motipur. Bajari is not a major silk textile producing centre.
Option C, Bhagalpur, is a city and a municipal corporation in the Bhagalpur district of Bihar. It is located on the banks of the Ganges River, about 200 km from Patna. Bhagalpur is not a major silk textile producing centre.
Option D, Dalmianagar, is a town and a notified area committee in the Rohtas district of Bihar. It is located about 150 km from Patna. Dalmianagar is not a major silk textile producing centre.
Option E, None of the above, is also not the correct answer.