Select the letters from among the given options that can replace the question mark (?) in the following series. K, M, O, ?, S, U,…

Question

Select the letters from among the given options that can replace the question mark (?) in the following series.

K, M, O, ?, S, U, ?, Y

1. A. Q, X
2. B. Q, W (Correct answer)
3. C. P, W
4. D. R, W

Correct Answer

Option B — Q, W

Detailed Solution & Explanation

The correct answer is Q, W.

Key Points

• Convert the letters to positions: K(11), M(13), O(15), ?, S(19), U(21), ?, Y(25).
• The step is a constant +2 throughout.
• The first gap sits between O(15) and S(19), so it is 17 = Q.
• The second sits between U(21) and Y(25), so it is 23 = W.

Additional Information

• Every letter here is an odd-numbered position, which is a useful check once the pattern is spotted — K, M, O, Q, S, U, W, Y are alternate letters of the alphabet.
• Converting to numbers is almost always faster than counting letters mentally, and it makes the constant difference immediately visible.
• Anchors worth memorising for quick conversion: A=1, E=5, J=10, O=15, T=20, Y=25, Z=26.

प्रश्न (हिन्दी में)

दिए गए विकल्पों में से वह अक्षर चुनिए जो निम्नलिखित श्रृंखला में प्रश्नवाचक चिह्न (?) के स्थान पर आ सके।

K, M, O, ?, S, U, ?, Y

1. A. Q, X
2. B. Q, W
3. C. P, W
4. D. R, W