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Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.

B _ M _ V B Q M _ V _ _ _ F V

Select the letter triad from the given options which follows the same relation as shown below.

(IL, FI, CF)

Select the option that is related to third letter cluster in the same way second letter cluster is related to first letter cluster.

NUCLEAR : DVOMSBF :: WEAPONS : BFXQTOP :: MISUSES : ?

Select the option that is related to the third number in the same way as the second number is related to the first number. 10 : 109 :: 12 : ?

Select the letter cluster that will replace the question mark (?) in the following series.

VCN, YAQ, BYT, EWW, HUZ, ?

If 31 @ 9 = 24 and 53 @ 33 = 96, then 19 @ 47 = '?'.