Question

Select the option that is related to the fifth number in

The logic is followed here- 7 x 3 21 14 x 3 42 18 x 3 54

the same way as the second number is related to the first number and the fourth number is related to the third number- 7 : 21 :: 14 :: 42 :: 18 : ?

A 57

B 54

C 63

D 72

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