In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative. - aa _ aaa _ aaaa _ aaaa _ b

D. BBBA

In following questions, one term in number series is incorrect. - Find out the incorrect number 1, 5, 5, 9, 7, 11, 11, 15, 12, 17

B. 12

In following questions, one term in number series is incorrect. - Find out the incorrect number 3, 4, 10, 32, 136, 685, 4116

B. 32

In following alphabet series , one term missing as shown by question mark . Choose missing term from options. - W, V, T, S, Q, P, N, M, ?, ?

D. K, J

Which term will replace the question mark in the series :
ABD, DGK, HMS, MTB, SBL, ?

A. ZKW