In each of the following questions, a group of three numbers/symbols is given in each option. Identify the group that does NOT follow the same pattern as the others.
A. K11 : I9 : G7
B. M13 : K11 : I9
C. O15 : M13 : K11
D. N14 : K11 : H8 (Correct answer)
Correct Answer
Option D — N14 : K11 : H8
Detailed Solution & Explanation
The correct answer is N14 : K11 : H8.
Key Points
In options A, B and C each element drops by exactly 2 in both letter and number: e.g. K11 → I9 → G7.
Option D goes N(14) → K(11) → H(8), a step of −3 each time, so it breaks the −2 pattern.
Check that the letter step and the number step move together and by the same amount; D is consistent internally but uses the wrong common difference.