MQ2
M and Q difference is-4
sqrt(4)=2
RV2
R and V difference is 4
sqrt(4)=2
DM3
D and M difference is 9
sqrt(9)=3
here all are satisfying this property but in case of PS3
difference between index of P and Q - 3
sqrt(3) is not equal to 3 so
option A is the odd one.