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    Which of the following letter will replace the question mark (?) in the given series? ?, N, K, H, E, B
    Question

    Which of the following letter will replace the question mark (?) in the given series?
    ?, N, K, H, E, B

    A.

    R

    B.

    Q

    C.

    P

    D.

    O

    Correct option is B

    Given series: ?, N, K, H, E, B
    Logic: The series decreases by 3 at each step:
    N = 14, K = 11, H = 8, E = 5, B = 2.
    The pattern in the positions:
    14 (N) → 11 (K) → 8 (H) → 5 (E) → 2 (B).
    For the missing letter before N:
    Add 3 to 14 (N) to get 17.
    The 17th letter of the alphabet is Q.
    Correct answer is (b) Q

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