Correct Answer - Option 4 : 0
Prime number: Prime number are those which are divisible by itself and 1.
Not a single five-digit prime number can be formed using the digits 1, 2, 3, 4, 5(without repetition).
This is because if one adds the digits, the result obtained will be = 1 + 2 + 3 + 4 + 5 = 15 which is divisible by 3.
Hence, any number obtained as a permutation of these 5 digits will be at least divisible by 3 and cannot be a prime number.