Correct Answer: NMOP

Solution : Given:
DCEF : QPRS :: XWYZ : ?

The pattern followed in letters of DCEF is the same as in letters of QPRS –
D – 1 = C; E + 1 = F and Q – 1 = P; R + 1 = S
Thus, DCEF is coded as QPRS.
Similarly, follow the same pattern for XWYZ –
X – 1 = W; Y + 1 = Z
Let's check the options –
First option: SRQP; S – 1 = R; Q – 1 = P
Second option: NMOP; N – 1 = M; O + 1 = P
Third option: STOV; S + 1 = T; O + 7 = V
Fourth option: IMGF; I + 4 = M; G – 1 = F

Thus, XWYZ is coded as NMOP. Hence, the second option is correct.