The correct answer is (c) Dehradun.
Dehradun was the capital of British Garhwal from 1815 to 1947. It was chosen as the capital because it was a centrally located town with good access to the surrounding hills. It was also a relatively safe town, as it was located away from the main trade routes.
Pauri was the capital of Garhwal before the British took over. It is a town located in the Garhwal Himalayas. It is a popular tourist destination, known for its temples and scenic views.
Tehri is a town located in the Garhwal Himalayas. It is the capital of the present-day state of Uttarakhand. It is a popular tourist destination, known for its temples and scenic views.
Nainital is a town located in the Kumaon Himalayas. It is the summer capital of the state of Uttarakhand. It is a popular tourist destination, known for its lakes and scenic views.