Correct option is C
Concept Used:
The hexadecimal number system is a base-16 number system.
Solution:
Since hexadecimal is base-16, it uses 16 distinct symbols. These are:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F
Thus, the number of distinct symbols used is 16