The Kakatiya capital, Orugallu, is now known as the city of:

Hyderabad
Warangal
Karimnagar
Vijayawada

The correct answer is: b) Warangal.

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

Hyderabad was founded in the 16th century by the Qutb Shahi dynasty. It was the capital of the Nizam of Hyderabad until 1948.

Karimnagar is a city in Telangana, India. It is the headquarters of Karimnagar district.

Vijayawada is a city in Andhra Pradesh, India. It is the headquarters of Krishna district.