The correct answer is (b), Dehradun.
The 1857 Revolution, also known as the Indian Rebellion of 1857, was a major uprising against the British East India Company in India. The rebellion began in Meerut on 10 May 1857 and spread to other parts of India, including Uttarakhand.
Dehradun was one of the cities that was most affected by the rebellion. The city was captured by the rebels on 24 May 1857 and remained under their control for several months. During this time, the rebels looted and destroyed many of the city’s buildings, including the British Residency.
The rebellion was eventually suppressed by the British, but it had a profound impact on Uttarakhand. The city of Dehradun was rebuilt after the rebellion, but it never fully recovered from the damage that was done.
The other options are incorrect because they were not as affected by the 1857 Revolution as Dehradun. Almora is a city in the Kumaon region of Uttarakhand. It was not as affected by the rebellion as Dehradun because it was located further away from the main centers of the rebellion. Haldwani is a city in the Kumaon region of Uttarakhand. It was not as affected by the rebellion as Dehradun because it was a smaller city with a smaller population. Kashipu is a town in the Garhwal region of Uttarakhand. It was not as affected by the rebellion as Dehradun because it was located further away from the main centers of the rebellion.