The capital city of the Kakatiya kingdom was:

The correct answer is A) Warangal.

Warangal was the capital of the Kakatiya kingdom from the 12th to the 14th centuries. It was an important center of trade and culture, and its ruins are a UNESCO World Heritage Site.

Karimnagar is a city in Telangana, India. It was founded in the 13th century by the Kakatiyas, and it served as their capital for a short time.

Hanumakonda is a town in Telangana, India. It is located near the ruins of the Kakatiya capital of Warangal.

Nalgonda is a district in Telangana, India. It was ruled by the Kakatiyas from the 12th to the 14th centuries.