Answer: Machilipatnam
Notes: Krishna district, in Coastal Andhra Pradesh, has Machilipatnam as headquarters. Named after Krishna River, it borders Bay of Bengal, Guntur, Bapatla, Eluru, and NTR districts. Area: 3,775 sq km, coastline 88 km. Forests cover 9%, with reserved areas and diverse flora and fauna. Soil types: black cotton, sand clay loams, red loams. Climate: tropical with hot summers, moderate winters, annual rainfall ~1048 mm. Historically ruled by Satavahanas, Pallavas, Chalukyas, Cholas, Kakatiyas, Reddy dynasty, Gajapathis, Vijayanagara, Golconda Sultanate, and British.
