(a) Narendra Modi
(b) Vivek Raj Singh
(c) Somnath Sanskrit University
(d) Saurabh Tiwari
Ans. (c)
Explanation: At the end of the ‘Saurashtra Tamil Sangam’ event, Indian Prime Minister Narendra Modi unveiled the book ‘Saurashtra Tamil Sangam Purasthi’ by Somnath Sanskrit University.