Select the related number from the given

Select the set of numbers that is similar to the following set.

(10, 127, 12)

How is J related to H?

27 : 36 : : 42 : ?

Select the option in which the numbers are not related in the same way as are the number of the following set.

(12, 15, 90)

Select the related word from the given alternatives.

Lemon : Sour :: Jaggery : ?

Select the option that is related to first number in the same way third number is related to forth number.

26: ? :: 33: 1155

If 24 @ 15 = 46 and 56 @ 24 = 108, then 45 @ 32 = '?'.

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

53: 636 :: 51: ?

If 4593 = 63, 7658 = 78, 885 = 63, then 9783 = ?