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

(NOTE : Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding /deleting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

(3, 5, 30)
(6, 5, 60)

(6, 7, 84)

(3, 5, 30)
(6, 5, 60)

The logic followed here is :

(Ist number × second number ) × 2 =  IIIrd number
as

(3 × 5 ) × 2 =  30

(6 × 5) × 2 =  60

Therefore in (6, 7, 84)

(6 × 7) × 2 =  84