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 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

In following number series, either one term is missing or is incorrect. - Choose correct answer from options 1, 5, 14, 30, 55, 93

C. 93