In the following question, a matrix of certain characters is given. These characters follow a certain trend, row-wise or column-wise. Find out this trend and choose the missing character accordingly.
3 6 8
5 8 4
4 7 ?

A. 6

In following number series, two terms have been put within brackets. Choose the appropriate option - Look at this series: 40, 40, 47, 47, 54, . . . What number should come next?

C. 54

Complete analogous pair - Annihilation : Fire : : Cataclysm : ?

B. FLOOD

Choose analogous pair - Curtain : Drapery

A. COCKROACH : INSECT

Complete analogous pair - Flower : Bud : : Plant : ?

A. SEED