What will be the output of the following C code?

#include <stdio.h>
void f(int);
void (*foo)(void) = f;
int main(int argc, char *argv[])
{
    foo(10);
    return 0;
}
void f(int i)
{
    printf("%d\n", i);
}

A. Compile time error

B. 10

C. Undefined behaviour

D. None of the mentioned

Answer: Option A