Correct option is D
The Calcutta Chromosome is not a part of Amitav Ghosh's Ibis trilogy. The Ibis trilogy is a trilogy of novels by Amitav Ghosh, consisting of the novels Sea of Poppies (2008), River of Smoke (2011) and Flood of Fire (2015). The trilogy is set in the Indian Ocean region during the 1830s in the lead-up to the First Opium War. It particularly focuses on the trade of opium between India and China and the trafficking of girmityas to Mauritius. The Calcutta Chromosome is a novel by Amitav Ghosh, first published in 1995. It is a detective novel set in Calcutta in the 1990s. The novel follows the story of Antara Dev, a young woman who is investigating the disappearance of her aunt. The Calcutta Chromosome is a complex and challenging novel, but it is also a rewarding one. It is a novel that explores themes of identity, belonging, and the meaning of home.