In following questions, three sequence of alphabets/numerals are provided which correspond to each other in some way. Find out alphabets/numerals that come in the blank places.Choose the correct option - C B _ _ D _ B A B C C B _  _ 1 2 4 3  _ _ ? ? ? ? a _ a b _ c _ b _ _ _ _

C. 3, 1, 1, 3

In following number series, two terms have been put within brackets. Choose the appropriate option - 85,78,65,40,56,x

B. 30

In following number series, two terms have been put within brackets. Choose the appropriate option - 2 , 4 , 12 , 48 , 240 , x

C. 1440

In following questions, one term in number series is incorrect. - Find out the incorrect number 11, 5, 20, 12, 40, 26, 74, 54

C. 40

In following number series, two terms have been put within brackets. Choose the appropriate option - Look at this series: 1000, 200, 40, . . . What number should come next?

A. 8