What is the major limitation of privatized extension

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)

"Vanish" is related to "Disappear" in the same way as "Prudent" is related to "____".

Which word will best complete the relationship given below?

Bricklayer : Trowel :: Tailor : ?

Select the related number from the given alternatives:

8 : ? :: 7 : 344

45 : 9 ::  (?)   : 7

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

If 14 @ 8 = 4 and 22 @ 15 = 6, then 18 @ 12 = ?'. What will come in place of question mark?

‘Confined spaces’ is related to ‘Claustrophobia’ in the same way as ‘Insects’ is related to ‘______’.