In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative. - _ c _ bd _ cdcda _ a _ db _ a

A. ADABCD

In following alphabet series , one term missing as shown by question mark . Choose missing term from options. - b, e, d, f, ?, h, j, ?, l

A. I, M

In following questions, one term in number series is incorrect. - Find out the incorrect number 6, 14, 30, 64, 126

C. 64

In following questions, a sequence of groups of alphabets and numbers is provided with one term missing , Choose the missing term from options. - Q1F, S2E, U6D, W21C, ?

C. Y88B

In following question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces. - 90, 180, 12, 50, 100, 200, , 3, 50, 4, 25, 2, 6, 30, 3

A. 150