The correct answer is A) Mahabubnagar.
Mahabubnagar is a district in the Indian state of Telangana. It is the second most populous district in Telangana after Hyderabad. The district is known for its sheep population. The sheep population in Mahabubnagar is estimated to be around 10 million. The sheep are reared for their wool, meat, and milk. The sheep are also used for transportation and as a source of manure.
The other options are incorrect. Warangal is a district in the Indian state of Telangana. It is the third most populous district in Telangana after Hyderabad and Mahabubnagar. The district is known for its historical monuments and temples. Nalgonda is a district in the Indian state of Telangana. It is the fourth most populous district in Telangana after Hyderabad, Mahabubnagar, and Warangal. The district is known for its agriculture and its production of cotton and rice. Karimnagar is a district in the Indian state of Telangana. It is the fifth most populous district in Telangana after Hyderabad, Mahabubnagar, Warangal, and Nalgonda. The district is known for its coal mines and its production of steel.