According to question each option have follows some pattern.
- $BCDEI$ follow the following pattern
- $B+1=C$
- $C+1=D$
- $D+1=E$
- $E+4=I$
- $PQRSW$ follow the following pattern
- $P+1=Q$
- $Q+1=R$
- $R+1=S$
- $S+4=W$
- $LMNOS$ follow the following pattern
- $L+1=M$
- $M+1=N$
- $N+1=O$
- $O+4=S$
- $HIKLO$ follow the following pattern
- $H+1=I$
- $I+2=K$
- $K+1=L$
- $L+3=O$
Clearly visible option $(D)$ follow the different pattern as compared to other options. (does not belong to the group)
So, the correct answer is $(D).$