The correct answer is: A. Bhagalpur
Bhagalpur is a city in the Indian state of Bihar. It is the headquarters of Bhagalpur district and Bhagalpur division. The city is located on the banks of the Ganges River, about 200 kilometers (120 mi) north of Patna, the state capital.
Bhagalpur is known for its silk industry. The city is home to a number of silk mills and factories. The silk produced in Bhagalpur is known for its high quality and is exported to many countries around the world.
In addition to its silk industry, Bhagalpur is also known for its education and healthcare facilities. The city is home to a number of universities, colleges, and hospitals.
Bhagalpur is a popular tourist destination. The city is home to a number of historical and religious sites, including the tomb of Sheikh Ibrahim Qureshi, the tomb of Pir Ali Shah, and the Bhagalpur Fort.
The other options are incorrect because:
- Patna is the capital of Bihar and is not known for its silk industry.
- Banka is a district in Bihar and is not known for its silk industry.
- Munger is a city in Bihar and is not known for its silk industry.