The district known as the “granary of Karnataka”:

Raichur
Mandya
Hassan
Kodagu

The correct answer is: B) Mandya

Mandya district is known as the “granary of Karnataka” because it is one of the major rice-producing districts in the state. It is also known for its sugar cane, cotton, and tobacco cultivation. The district is located in the southern part of Karnataka, and it is bounded by the districts of Mysuru, Hassan, Chamarajanagar, Ramanagara, and Tumakuru. The headquarters of Mandya district is the town of Mandya.

Raichur district is located in the northern part of Karnataka, and it is bounded by the districts of Yadgir, Gulbarga, Koppal, Bellary, and Andhra Pradesh. The headquarters of Raichur district is the town of Raichur.

Hassan district is located in the central part of Karnataka, and it is bounded by the districts of Chikmagalur, Shimoga, Tumakuru, Mandya, and Mysuru. The headquarters of Hassan district is the town of Hassan.

Kodagu district is located in the southwestern part of Karnataka, and it is bounded by the districts of Mysuru, Chamarajanagar, and Kerala. The headquarters of Kodagu district is the town of Madikeri.

Mandya district is a major rice-producing district in Karnataka. The district has a long history of rice cultivation, and it is one of the major rice-producing districts in the state. The district is also known for its sugar cane, cotton, and tobacco cultivation. The district is located in the southern part of Karnataka, and it is bounded by the districts of Mysuru, Hassan, Chamarajanagar, Ramanagara, and Tumakuru. The headquarters of Mandya district is the town of Mandya.