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What should come in place of the question mark in the series: BDA, EGD, HJG, KMJ, ?
NPM
NQM
OPN
MPL
NPM
A is correct because each letter position increases by 3, yielding NPM.
First Letter
B(2) + 3 = E(5) + 3 = H(8) + 3 = K(11) + 3 = N(14).
Second Letter
D(4) + 3 = G(7) + 3 = J(10) + 3 = M(13) + 3 = P(16).
Third Letter
A(1) + 3 = D(4) + 3 = G(7) + 3 = J(10) + 3 = M(13).
A is correct because each letter position increases by 3, yielding NPM.