Select the option in which the numbers shares the same relationship in set as that shared by the numbers in the given 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)

(812, 879, 947)

(648, 715, 783)

(612, 679, 747) 

(812, 879, 947)

(648, 715, 783)

The logic followed here is :

Ist number + 67 = second number and second number + 68 = IIIrd number

As

812 + 67 = 879 and 879 + 68 = 947

648 + 67 = 715 and 715 + 68 = 783

Same as in  option (612, 679, 747)

612 + 67 = 679 and 679 + 68 = 747