Who can make the rules related to peace, prosperity and

In each of the following questions, choose that set numbers from the four alternative sets, that is similar to the given set.

Bull : Cow :: Tutor : ?

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

If 66 @ 26 = 15' and 44 @ 6 = 12', then 56 @ 12 = ?'. What will come in place of question mark? 

Select the option that is related to the third word in the same way as the second word is related to the first word.

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

(4, 8, 40)

Select the right analogous pair from the given options.

Melt : Liquid :: Freeze : ?

If 42 @ 21 = 18' and 35 @ 27 = 18', then 46 @ 32 = ?'. What will come in place of question mark?

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