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Command Line Arguments - Programming

Q1:

What will be the output of the program 
#include<stdio.h>
void fun(int);

int main(int argc)
{
    printf('%d ', argc);
    fun(argc);
    return 0;
}
void fun(int i)
{
    if(i!=4)
        main(++i);
}

A 1 2 3

B 1 2 3 4

C 2 3 4

D 1

ANS:A - 1 2 3

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