The correct answer is (b), Anandamath.
Anandamath is a Bengali-language novel by Bankim Chandra Chattopadhyay, first published in 1882. It is considered one of the most important novels in Bengali literature. The novel is set in the 18th century during the reign of the Mughal emperor Aurangzeb. It tells the story of a group of Hindu rebels who fight against the Mughals. The novel is full of patriotic and religious fervor, and it has been called the “Bible of Bengali Patriotism.”
The other options are incorrect. Geetanjali is a collection of poems by Rabindranath Tagore, first published in 1910. Devdas is a novel by Sarat Chandra Chattopadhyay, first published in 1901. Gora is a novel by Rabindranath Tagore, first published in 1907.