This question is about matching notable authors (List I) with the respective books they`ve written (List II).

Option 1 (correct) matches Shashi Tharoor to `Show Business`, which is correct as Tharoor authored this book. It also correctly links Amitav Ghosh to `Circle of Reason`, and Anita Desai to `Clear Light of Day`. Finally, Vikram Chandra is matched to `Love and Longing in Bombay`, another correct pairing.

Option 2 incorrectly matches Anita Desai to `Love and Longing in Bombay`, a book written by Vikram Chandra. Similarly, it incorrectly pairs Vikram Chandra with `Clear Light of Day`, which was actually written by Anita Desai.

Option 3 incorrectly links Shashi Tharoor to `Circle of Reason` (a book by Amitav Ghosh) and Amitav Ghosh to `Show Business` (a book by Shashi Tharoor). Therefore, this is not a valid option.

Option 4 makes the same errors as option 3 and additionally matches Anita Desai to `Love and Longing in Bombay` and Vikram Chandra to `Clear Light of Day`, both of which are incorrect.

In summary, the correct answer is option 1