In the given letter-cluster triads, the letter-clusters in a particular triad are related following a certain logic. Study the given triads carefully and from the given options, select the triad that follows the same logic.

(ACE∶ BDF∶ CEG)

(SUW∶ TVX∶ UWY)

Given: 

(ACE∶ BDF∶ CEG)

(SUW∶ TVX∶ UWY)

Logic: each letter is increasing by 1.

As,

(ACE∶ BDF∶ CEG)

A+1=B, B+1=C

C+1=D, D+1=E

E+1=F, F+1=G

and

(SUW∶ TVX∶ UWY)

S+1=T, T+1=U

U+1=V, V+1=W

W+1=X, X+1=Y

Now, check options-

(a) (ACF:BDE:CFH)

A+1=B, B+1=C

C+1=D, D+2=F

F-1=E, E+3=H

So, its not correct.

(b) (KMO : LNP : MOQ)

K+1=L, L+1=M

M+1=N, N+1=O

O+1=P, P+1=Q

(c) (QRS : TUV : WXY)

Q+3=T, T+3=W

R+3=X, U+3=X

S+3=V, V+3=Y

So, its not correct.

(d) (SUW : TVX : YAC)

S+1=T, T+5=Y

U+1=V, V+5=A

W+1=X, X+5=C

So, its not correct.

Thus, correct option is (b).