Which header file should be included in a C program to use variable parameter functions like va_start and va_arg?

Which header file should be included in a C program to use variable parameter functions like va_start and va_arg?
A . <stdarg.h>
B . <math.h>
C . <stdio.h>
D . <stdlib.h>

View Answer

Answer: A

Explanation:

The <stdarg.h> header file should be included to use variable parameter functions.