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. - 3, 7, 15, 31, 63,

C. 127

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

B. BAAB

In the following question, a group of letters is given which are numbered 1, 2, 3, 4, 5 and 6. Below are given four alternatives containing combinations of these numbers. Select that combination of numbers so that letters arranged accordingly, form a meaningful word. A  E  H  R  K  N
1  2  3  4  5  6

C. 3, 1, 6, 5, 2, 4

In following questions, a sequence of groups of alphabets and numbers is provided with one term missing , Choose the missing term from options. - 2A11, 4D13, 12G17, ?

D. 48J23

Choose analogous pair - Hillock : Mountain

C. BUSH : FOREST