Correct option is B
Given: Letter clusters: XAD, QUY, FIL, LOR.
Concept: Alphabetic positional increment series.
Solution:
Check the numerical forward shift between letters in each cluster:
Option A (XAD): X(24) + 3 = A(1, cyclical 27); A(1) + 3 = D(4). Pattern is +3, +3.
Option C (FIL): F(6) + 3 = I(9); I(9) + 3 = L(12). Pattern is +3, +3.
Option D (LOR): L(12) + 3 = O(15); O(15) + 3 = R(18). Pattern is +3, +3.
Option B (QUY): Q(17) + 4 = U(21); U(21) + 4 = Y(25). Pattern is +4, +4.
Because QUY follows a +4 increment while the rest strictly follow a +3 increment, it is the odd one out.
Final Answer: QUY
So the correct answer is (b)
