Memory Allocation

Specify the 2 library functions to dynamically allocate memory?

How will you free the memory allocated by the following program?

#include<stdio.h>
#include<stdlib.h>
#define MAXROW 3
#define MAXCOL 4

int main()
{
int **p, i, j;
p = (int **) malloc(MAXROW * sizeof(int*));
return 0;
}

What function should be used to free the memory allocated by calloc() ?

Which header file should be included to use functions like malloc() and calloc()?