1. What is the output of this program? #include<stdio.h> int main() { int *ptr; ptr = (int *)calloc(1,sizeof(int)); *ptr = 10; printf(”%dn”,*ptr); return 0; } a) 0 b) -1 c) 10 d) none of the mentioned AnswerAnswer: d [Reason:] This program will give an error because calloc() requires the header file stdlib.h. Output: [ aidlo]#…