Question

Select the letter-cluster from among the given options that can replace the question mark (?) in the following series. ZEG XIN VMU TOB ?

• A. RFD
• B. RFC
• C. RUI
• D. RYD

Answer 1

Answer:

C. RUI

Analyze each position separately:

Term	1st Letter	2nd Letter	3rd Letter
ZEG	Z	E	G
XIN	X	I	N
VMU	V	M	U
TOB	T	Q	B
?	R	U	I

Patterns:

• 1st letters: Z, X, V, T → decrease by 2 each time → R

• 2nd letters: E, I, M, Q → increase by 4 each time → U

• 3rd letters: G, N, U, B → increase by 7 each time (cycling through the alphabet) → I

Therefore, the missing letter-cluster is:

RUI