Explanation:

- Option 1: Deepak Surana

- This is the correct answer. Deepak Surana authored the book “The Shershah of Kargil: Captain Vikram Batra.”

- Option 2: Chetan Bhagat

- Chetan Bhagat is a well-known Indian author, famous for books like "Five Point Someone" and "One Indian Girl," but he did not write this book.

- Option 3: Ravinder Jain

- Ravinder Jain was a renowned music director, not an author related to this book.

- Option 4: Vikram Batra

- Captain Vikram Batra was an Indian Army officer and a hero of the Kargil War. He is the subject of the book, not the author.

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