What percent of the earth’s surface is covered by the

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:

Ephemeral : Perpetual :: Zenith : ?

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

CF : JM :: QT : ?

Select the set in which the numbers are NOT related in the same way as are the numbers of the given set.

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

49: 49 :: 92: ?

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