ANS:A - 3CB0

Divide by 16 and get the remainder as the lsb of the hexadecimal, repeat the process till the complete of all division.

Explanation:

1) 15536/16 = rem(0) & quo(971). The lsb of hexadecimal is 0.
2) 971/16 = rem(11) & quo(60). The next to lsb is 11, i.e., B.
3) 60/16 = rem(12) & quo(3). The second next to lsb is 12, i.e., C.
4) 3/16 = rem(3) & quo(0). The last one is 3.

So the final answer be (3CB0).