Which of the following is the correct output for the program

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Which of the following is the correct output for the program given below?

#include<stdio.h>
int main ( )
{
    float *p;
    printf ( "%d\n " , sizeof ( p ) );
    return 0 ;
}

1. 2 in 16-bit compiler like TC/TC++, 4 in 32-bit compiler like Visual studio or gcc
2. 4 in 16-bit compiler like TC/TC++, 2 in 32-bit compiler like Visual Studio or gcc
3. 4 in 16-bit compiler like TC/TC++, 4 in 32-bit compiler like Visual Studio or gcc
4. 2 in 16-bit compiler like TC/TC++, 2 in 32-bit compiler like Visual studio or gcc

2 in 16-bit compiler like TC/TC++, 4 in 32-bit compiler like Visual studio or gcc