Answer :
Answer:
2 & 3
Explanation:
Only mathematical operations that can be used to change contents of pointer variables include addition, subtraction, comparison, increments and decrements.
Although modulus, division and multiplications are not possible. A snippet of code is attached showing pointers addition and subtraction and their result.
Check it by replacing + or - signs with *, / or % which represent multiplication, division and modulus respectively. It would result in an error.

