Question

    Select the letter cluster from among the given options

    that can replace the question mark (?) in the following series. IDF, NIK, ?, UPR, WRT, XSU
    A SNP Correct Answer Incorrect Answer
    B SMO Correct Answer Incorrect Answer
    C RMO Correct Answer Incorrect Answer
    D RNP Correct Answer Incorrect Answer

    Solution

    The series is alternated with two series: IDF, NIK I + 5 = N D + 5 = I F + 5 = K NIK,? N + 4 = R I + 4 = M K + 4 = O RMO, UPR R + 3 = U M + 3 = P O + 3 = R UPR, WRT U + 2 = W P + 2 = R R + 2 = T VQS, WRT V + 1 = W Q + 1 = R S + 1 = T

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