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Which of the following is correct?

163. Which of the following is correct?

1. "ptr = calloc(a, b)" is equivalent to ptr = malloc(a * b); memset(ptr, 0, a * b);
2. "ptr = calloc(a, b)" is equivalent to ptr = malloc(a * b);
3. "ptr = calloc(a, b)" is equivalent to ptr = malloc(a); memset(ptr, 0, a);
4. "ptr = calloc(a, b)" is equivalent to ptr = malloc(a); memset(ptr, 0, a);

Answer: A) "ptr = calloc(a, b)" is equivalent to ptr = malloc(a * b); memset(ptr, 0, a * b);

Explanation:

Option A is correct.