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 _ _ _ _
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?