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    Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete? LDH 14, NFJ 17,
    Question

    Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
    LDH 14, NFJ 17, PHL 20, RJN 23, ?

    A.

    TLP 26

    B.

    RTS 26

    C.

    RTQ 27

    D.

    TMO 27

    Correct option is A

    Given: LDH 14, NFJ 17, PHL 20, RJN 23, ?
    Logic: Each letter increased by +2 places n English alphabet and number increased by +3

    1st letter:
    L + 2 = N
    N + 2 = P
    P + 2 = R
    R + 2 = T
    2nd Letter:
    D + 2 = F
    F + 2 = H
    H + 2 = J
    J + 2 = L
    3rd Letter:
    H + 2 = J 
    J + 2 = L
    L + 2 = N
    N + 2 = P
    Number:
    14 → 17 → 20 → 23 → 26
    So, ? = TLP 26
    Thus, the correct option is (A) TLP 26

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