Question

    Select the letter-cluster from among the given options

    that can replace the question mark (?) in the following series. GF, KI, OL, SO, ?
    A YS Correct Answer Incorrect Answer
    B WR Correct Answer Incorrect Answer
    C WS Correct Answer Incorrect Answer
    D XR Correct Answer Incorrect Answer

    Solution

    G + 4 = K; K + 4 = O; O + 4 = S; S + 4 = W F + 3 = I; I + 3 = L; L + 3 = O; O + 3 = R

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