The district bordering the state of Tamil Nadu:

Mandya
Ramanagara
Chamarajanagara
Kolar

The correct answer is: A) Mandya

Mandya district is one of the 30 districts of Karnataka state in southern India. It is located in the southern part of the state and is bounded by the districts of Mysore, Chamarajanagar, Hassan, Ramanagara, and Tamil Nadu. The district headquarters is Mandya town.

Mandya district is a major producer of rice, sugarcane, and cotton. The district is also home to several important temples, including the Srirangapatna Fort, the Chennakeshava Temple, and the Mandya Palace.

The other options are incorrect because they are not districts of Karnataka that border Tamil Nadu.

  • Ramanagara district is located in the northern part of Karnataka and is bounded by the districts of Kolar, Chikkaballapur, Tumkur, and Bengaluru Rural.
  • Chamarajanagara district is located in the southwestern part of Karnataka and is bounded by the districts of Mysore, Hassan, Kodagu, and Tamil Nadu.
  • Kolar district is located in the northern part of Karnataka and is bounded by the districts of Chikkaballapur, Tumkur, Ramanagara, and Tamil Nadu.