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

(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 /subtracting /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).

(56, 6, 34)

(102, 27, 78)

(76, 34, 72)

(56, 6, 34)

(102, 27, 78)

The logic followed here is :

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

As

(34  - 6)  × 2  = 56       

(78  - 27)  × 2  = 102

Therefore(76, 34, 72)

(72  - 34)  × 2 = 76