Select the option in which the numbers are related in the same way as are the numbers of the following sets.  

(8, 5, 43)

(6, 3, 21)

Select the related number from the given alternatives:

13 : ? :: 12 : 1729

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

VCN, YAQ, BYT, EWW, HUZ, ?

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

Select the related word/ letters/ number from the given alternatives.

PJQR : QKIJ :: RJDY : ?

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

Medicine : Dispensary  ::  Aeroplane : ?

Select the related number from the given alternatives.

82: 160 :: 36: ?