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 /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)
(21, 34, 76)
(39, 26, 104)

Correct option is D

Given sets:
1. Set 1: (21, 34, 76)
2. Set 2: (39, 26, 104)
Let's identify a common relationship:
1. For Set 1: (21, 34, 76) - Operation: 34 + 21 × 2 = 34 + 42 = 76
2. For Set 2: (39, 26, 104) - Operation: 26 + 39 × 2 = 26 + 78 = 104
Logic: second number + first number × 2 = third number
By applying the logic in each options we get,
Option (a) (34, 25, 102) - 25 + 34 × 2 = 25 + 68 = 93 ≠ 102
Option (b) (37, 43, 127)- 43 + 37 × 2 = 43 + 74 = 117 ≠ 127
Option (c) (25, 31, 108)- 31 + 25 × 2 = 31 + 50 = 81 ≠ 108
Option (d) (28, 23, 79)- 23 + 28 × 2 = 23 + 56 = 79 (correct )
Option d is correct.