Based on the English alphabetical order, three of the following four letter-clusters arealike in a certain way and thus form a group. Which is the one that DOES NOT belong tothat group?(Note: The odd one out is not based on the number of consonants/vowels or theirposition in the letter-cluster.)​​

Logic: 1st letter + 1 = 2nd letter and 2nd letter - 3 = 3rd letter

Now, we check each options.

Option (a): LMJ (Follow)

L + 1 = M and M - 3 = J

Option (b): ONL (Not Follow)​

O + 1 $$\neq$$​ N and N - 3 $$\neq$$​ L

Option (c): EFC (Follow)​

E + 1 = F and F - 3 = C

Option (d): FGD (Follow)​

F + 1 = G and G - 3 = D

Thus, correct option is (b).