Given : ‘a’ is a positive integer.I. Given : It is an odd number.‘a’ may or may not be a prime number.e.g. While 3 is a prime, 9 is a non-prime.∴ I alone is not sufficient.II. Given: It is an even integer greater than 2.⇒ a = 4, 6, 8, 10,.....⇒ ‘a’ is not a prime number.∴ II alone is sufficient