Concept:This question tests awareness of famous Indian English authors and their major literary works.Explanation:The novel 'A Suitable Boy' was written by Vikram Seth. It was published in 1993 and is one of the longest novels ever published in a single volume, with over 1,300 pages. The story is set in post-independence India during the 1950s and revolves around four families. The plot focuses on the search for a suitable husband for the protagonist, Lata Mehra. The novel explores themes like family, love, politics, and religious tensions. Vikram Seth is a celebrated Indian author and poet. His other notable works include 'The Golden Gate' and 'An Equal Music'. The other authors listed are known for different works: Salman Rushdie wrote 'Midnight's Children', Chetan Bhagat wrote 'Five Point Someone', and Manu Joseph wrote 'Serious Men'.Answer:Vikram Seth (Option A)