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

Logic: Pattern are +2, +1 in English alphabet.

Let's check the options:

Option (a): LNO
L + 2 = N
N + 1 = O 
​Option (b): TVW
T + 2 = V
V + 1 = W 
​Option (c): ACD
A + 2 = C
C + 1 = D 
​Option (d): JLN  (Pattern Not Follow)
J + 2 = L
L + 2 = N

Odd One Out: Option (d) JLN does not follow the same pattern as other options follow to making it odd one out.

Thus, the correct option is (d) JLN.