Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the one that is different. (Note: The odd one out is not based on the number of consonants/vowels or their position in the letter cluster.)

Given: Four letter-clusters with one being different from the others.

Logic: By observing the patterns (+5, -2 ),

P (16) → +4 → T (20)
T (20) → + 2 → V (22)
(b) EJH
E (5) → +5 → J (10)
J (10) → -2 → H (8)
(c) XCA
X (24) → +5 → C (3) (Wraps around alphabet)
C (3) → -2 → A (1)
(d) LQO
L (12) → +5 → Q (17)
Q (17) → -2 → O (15)
EJH, LQO, and XCA follow the "+5, -2" rule consistently.
PTV does not follow this pattern correctly.
Correct answer is (a)