no error

a = b; and b = c;

c = d; and d = a;

a = b; and d = a;

malloc (m*n, 0);

memset(0, m*n);

ptr = malloc (m*n); memset (p, 0, m*n);

ptr = malloc(m*n); strcpy(p, u);

same as that of sizeof (t)

greater than that of sizeof (t)

less than that of sizeof (t)

none of the above

Both are exactly same

Array is a constant pointer

Pointer is an one-dimensional and dynamic array

All of these

4 bytes

2 bytes

1 byte

None of these