The correct answer is B. Danapur.
The Revolt of 1857, also known as the Indian Rebellion of 1857, the Sepoy Mutiny, or the First War of Indian Independence, was a major uprising in India against the rule of the British East India Company. The revolt began on 10 May 1857 with the mutiny of the 3rd Bengal Native Infantry at Meerut, and spread rapidly to other parts of northern India. The rebels were motivated by a variety of factors, including religious and economic grievances, as well as a desire for independence from British rule. The revolt was ultimately unsuccessful, but it had a profound impact on the history of India.
The first uprising in Bihar took place at Danapur on 25 May 1857. The 14th and 34th Native Infantry regiments stationed at Danapur mutinied and marched on Patna. The rebels were defeated by British troops, but the uprising had a significant impact on the course of the revolt in Bihar.
The other options are incorrect. Deoghar is a city in Jharkhand, India. Muzaffarpur is a city in Bihar, India. Patna is the capital of Bihar, India.