Q: In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.
Question: When did the war that Eyre served as a rifle brigade officer begin? Passage:A Rifle Brigade officer, he served in the Crimean War, being present at the siege and fall of Sebastopol and wounded at the assault of the Redan. He served throughout the Indian Mutiny and was present at the taking of Lucknow, capture of Mynponee and operations in the Central India Campaign on the Ram Gunga River. He was present in the actions of Gwalior (included a mention in the despatch of Sir Hugh Rose) and the capture of Kalpi with the Camel Corps. This unit was formed from four officers and 100 men from the 2nd and 3rd Battalions Rifle Brigade. An elite unit, the officers were carefully picked due to the required level in independent command. He retired from the army in 1858 and entered the Militia.
Links: a. Central Indian campaign of 1858 b. Crimean War c. Central Indian campaign of 1858 d. Crimean War
A:
b