question_answer

How many 9s are there in the following number series which are immediately preceded by 3 and followed by 6? 3 9 6 9 3 9 3 9 3 9 6 3 9 3 6 3 9 5 6 9 5 6 9 3 9 6 3 9

A)  0                                            

B)  3

C)  2                            

D)         4