Sepoys’ refusal to use cow/pig fat cartridges caused which war?

The 1857 War of Independence; also called the Sepoy Mutiny; was triggered by sepoys’ refusal to use cartridges greased with cow and pig fat; offending Hindu and Muslim sentiments. This sparked widespread rebellion against British rule. Mysore and Buxar wars are unrelated; making A the correct answer. This event is central to Pakistan Studies.