The correct answer is option 2: Anandmath. Anandmath is a novel written by Bankim Chandra Chatterjee, a prominent Indian writer, and philosopher. This novel was published in 1882 and is set during the backdrop of the Sannyasi Rebellion in the late 18th century. The story revolves around a group of freedom fighters called the "Sannyasis" who fight against British oppression. The novel portrays the bravery and sacrifice of these freedom fighters, and their struggle for independence. Anandmath became immensely popular among the Indian nationalists during the freedom movement, and it played a significant role in inspiring and fueling the spirit of patriotism among them. It became a source of inspiration for many freedom fighters who fought for India`s independence from British rule.