The Bimbisar Fort is located in the region of:

The correct answer is: b) Jammu City

The Bimbisar Fort is located in the city of Jammu, in the Indian state of Jammu and Kashmir. It is a 16th-century fort that was built by the Mughal emperor Akbar. The fort is located on a hilltop overlooking the city of Jammu. It is a popular tourist destination and offers stunning views of the city and the surrounding mountains.

The other options are incorrect because:

• Poonch is a town in the Poonch district of Jammu and Kashmir. It is located about 100 kilometers from Jammu City.
• Rajouri is a town in the Rajouri district of Jammu and Kashmir. It is located about 150 kilometers from Jammu City.
• Srinagar is the summer capital of Jammu and Kashmir. It is located about 250 kilometers from Jammu City.