Each latter from the given question has some pattern.
The first & third alphabets have $+1 $ pattern, second and fourth alphabets have $+1 $ pattern.
- $ LNMO : L\overset{+1}\longrightarrow M, N\overset{+1}\longrightarrow O $
- $ CRDT : C\overset{+1}\longrightarrow D, R\overset{+2}\longrightarrow T $
- $EUFV : E\overset{+1}\longrightarrow F, U\overset{+1}\longrightarrow V $
- $GWHX: G\overset{+1}\longrightarrow H, W\overset{+1}\longrightarrow X $
$CRDT$ having different patterns.
So Option $(B)$ is correct.