A bag has 15 red, green and blue balls. Number of each balls is different in the bag. Difference between red ball and green ball is same as difference between green ball and blue ball. Probability of selecting one blue ball from the bag is greater than 0.2, then number of blue balls in the bag can be
(A) 3 (B) 4 (C) 5 (D) 7 (E) 9
(a) Only B, C, D and E
(b) Only B, D, E
(c) All A, B, C, D and E
(d) Only C, D, E
(e) Only A, B, D, E