Plz explain how output is 12

Question

#include<stdio.h>
int main()
{
int a=90;
int *p1=&a;
*p1=11;
(*p1)++;
printf("%d",a);
return 0;
}

Answer 1

*p is a pointer on variable (a).
So when u asign 11 to *p that mean the value of variable (a) changes to 11.
Also if u increment *p the value of variable (a) will increment to 12.