What will come in place of the question mark (?) in the following letter series? AB, EF, IJ, MN, ?
A. WS
B. QU
C. QR
D. VR
Answer: Option C
Solution (By JKSSB Mock Tests)
First letters: A(1)+4=E(5), E+4=I(9), I+4=M(13), M+4=Q(17). Second letters: B(2)+4=F(6), F+4=J(10), J+4=N(14), N+4=R(18). The missing pair is QR.[reference:8]
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