Which of the following is a work by famous Indian author Khushwant Singh?

Train to Pakistan

The correct answer is Option (2) → Train to Pakistan

Out of the choices you listed, the work by famous Indian author Khushwant Singh is:

Train to Pakistan

• A Suitable Boy - This is a novel by Vikram Seth.
• The Guide - This is a novel by R. K. Narayan.
• Sacred Games - This is a novel by Vikram Chandra.