The correct answer is D. Ranchi.
The Institute of Mental Health (IMH), Ranchi is a government-run psychiatric hospital located in Ranchi, Jharkhand, India. It is the largest psychiatric hospital in the state of Jharkhand and one of the largest in India. The hospital was established in 1878 and is affiliated to the Ranchi University. It has a bed capacity of 1,000 patients and offers a wide range of psychiatric services, including inpatient care, outpatient care, and day care. The hospital also has a research wing and a training center.
The other options are incorrect.
A. Dhanbad is a city in the Indian state of Jharkhand. It is the headquarters of Dhanbad district and the Dhanbad division. Dhanbad is the second-largest city in Jharkhand after Ranchi. The city is known for its coal mining industry.
B. Nalanda is an ancient city in the Indian state of Bihar. It was the capital of the Magadha Empire during the Mauryan period. Nalanda is known for its ancient university, which was one of the most important centers of learning in the world.
C. Patna is the capital of the Indian state of Bihar. It is the second-largest city in Bihar after Gaya. Patna is known for its historical monuments, including the Patna Sahib Gurudwara, the Golghar, and the Kumhrar archaeological site.