Option 1, Chaur Uprising, refers to a peasant revolt that took place in 1804 in Awadh region of Uttar Pradesh. It was led by a farmer named Baba Ramchandra. So, this option is not the correct answer.

Option 2, Sanyasi Rebellion, is the correct answer. Bankim Chandra Chattopadhyay`s novel `Anand Math` portrays the Sanyasi Rebellion in Bengal. It was a movement that emerged in the late 18th century and early 19th century, led by warrior ascetics called Sanyasis, who were dissatisfied with British colonial policies.

Option 3, Kol Uprising, refers to the tribal revolt in Chotanagpur region of Bihar and Jharkhand. It took place in 1831-1832 and was not the focus of the novel `Anand Math`.

Option 4, Santhal Uprising, was a significant tribal rebellion in Bihar and Jharkhand. It occurred in 1855 led by the Santhal tribe under the leadership of Sidhu and Kanhu Murmu. Although it was an important rebellion, it was not the rebellion highlighted in `Anand Math`.

Therefore, the correct answer is option 2,