The correct answer is option 1 - 1, 2 and 3. All three Indian writers - Amitabh Ghosh, Jeet Thayil, and Uday Prakash were shortlisted for the DSC Prize for South Asian Literature in 2013. The DSC Prize is an annual literary award that recognizes and promotes South Asian fiction writing.

It is important to note that option 2 - 1 and 2 only is incorrect because it does not include Uday Prakash in the list, who was also shortlisted for the prize. Similarly, option 3 - 2 and 3 only is incorrect because it excludes Amitabh Ghosh.

It is always advisable to carefully read each option and verify the information provided before selecting the correct answer. In this case, the correct answer includes all three writers who were shortlisted for the DSC Prize in 2013.