The correct answer is A. Ranchi.
Ranchi is the capital of Jharkhand state in India. It is located in the Chota Nagpur Plateau in the south-eastern part of the state. Ranchi is the most populous city in Jharkhand with a population of over 2.5 million people. The city is known for its natural beauty, its colonial architecture, and its tribal culture.
Dhanbad is the second largest city in Jharkhand. It is located in the eastern part of the state. Dhanbad is a major coal mining city and is known for its industrial development.
Jamshedpur is the third largest city in Jharkhand. It is located in the eastern part of the state. Jamshedpur is a major steel manufacturing city and is known for its industrial development.
West Singhbhum is a district in Jharkhand. It is located in the south-western part of the state. West Singhbhum is a tribal-dominated district and is known for its natural beauty.