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)

(9, 15, 21)

(31, 37, 43)

(65, 71, 77)

(9, 15, 21)

(31, 37, 43)

The logic followed here is :

Ist number + 6 = second number and second number + 6 = IIIrd number

as

9 + 6 = 15  and 15 + 6 = 21

31 + 6 = 37  and 37 + 6 = 43

Same as in (65, 71, 77)

65 + 6 = 71 and 71 + 6 = 77