Three of the following four letter-clusters are alike in a certain way and one is different. Pick the odd one out.

(NOTE: The odd one out is not based on the number of vowels or consonants in the word)​​

Let's check the options

Logic: 1st and 2nd letter are opposite to each other, and 3rd = 1st - 4. 

Option A: JQF

J → Q

J - 4 = F

Option B: NRI

N → R

N - 4 = J ≠ I​

​Option  C: SHO

S → H

S - 4 = O

Option D: VER

V → E

V - 4 = R

Thus, correct option is (b).