Identify the storage class with which & operator cannot be used.

A. register

B. static

C. extern

D. auto

Correct Answer is :

A. register

Explanation

The register storage class is used to define local variables that should be stored in a register instead of RAM. This means that the variable has a maximum size equal to the register size (usually one word) and can't have the unary '&' operator applied to it (as it does not have a memory location).