What substitution should be made to //-Reference such that

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What substitution should be made to //-Reference such that p1 points to variable t3 in the following C code?

#include <stdio.h>
    int main()
    {
        int t1 = 1, t2 = 2, t3 = 3;
        int *p1 = &t1;
        int **p2 = &p1;
        //-Reference 
    }

1. **p2 = &t3;
2. *p1 = &t3;
3. *p2 = &t3;
4. All of above
5. None of these

Correct Option: C

*p2 = &t3;