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va_list is

  • A.a macro defined in stdarg.h
  • B.a predefined data type in stdarg.h
  • C.a macro defined in stdlib.h
  • D.a predefined data type stdlib.h.

Answer: B

Correct answer: a predefined data type in stdarg.h

va_list is a type - a typedef declared in <stdarg.h> - used to declare the object that holds the state of the walk through the variable arguments. va_start, va_arg and va_end are the macros that operate on it.

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