The correct answer is A) Hyderabad.
Hyderabad is the capital of Telangana and the sixth most populous city in India. It has a population of over 7 million people, making it the most populous district in Telangana. The population density of Hyderabad is over 2,000 people per square kilometer.
Warangal Urban is the second most populous district in Telangana, with a population of over 3 million people. The population density of Warangal Urban is over 1,000 people per square kilometer.
Ranga Reddy is the third most populous district in Telangana, with a population of over 2 million people. The population density of Ranga Reddy is over 800 people per square kilometer.
Karimnagar is the fourth most populous district in Telangana, with a population of over 2 million people. The population density of Karimnagar is over 600 people per square kilometer.
The population density of a district is the number of people living in that district per square kilometer. It is a measure of how crowded a district is. The population density of a district can be affected by a number of factors, including the size of the district, the natural resources of the district, and the economic development of the district.