2024-From the data 1, 4, 7, 9, 16, 21, 25, if all even numbers are removed, then the probability

From the data 1, 4, 7, 9, 16, 21, 25, if all even numbers are removed, then the probability of getting at random a prime number from the remaining is :
(a) 2/5 (b) 1/5 (c) 1/7 (d) 2/7