The correct answer is A) Hyderabad.
Hyderabad is the capital of Telangana and the sixth most populous city in India. It is a major center for education, healthcare, and technology. The city has a high standard of living and a well-developed infrastructure.
Adilabad is a district in Telangana. It is located in the north-eastern part of the state. The district has a population of over 3 million people. The main towns in the district are Adilabad, Nirmal, and Mancherial.
Mahabubnagar is a district in Telangana. It is located in the central part of the state. The district has a population of over 3 million people. The main towns in the district are Mahabubnagar, Gadwal, and Narayanpet.
Nalgonda is a district in Telangana. It is located in the south-central part of the state. The district has a population of over 2 million people. The main towns in the district are Nalgonda, Suryapet, and Miryalaguda.
Hyderabad has a higher HDI than Adilabad, Mahabubnagar, and Nalgonda. This is because Hyderabad has a higher per capita income, a lower poverty rate, and a higher literacy rate.