Six boys A, B, C, D, E, F sit in a row facing West. D is between A and C (in order A … D … C or C … D … A). B is immediately to the right of C but to the left of F (C–B–F consecutive). E is not at the right end. Who is at the right end?

Introduction / Context:
The consecutive block (C–B–F) plus the “between” relation for D and the end restriction for E allow a consistent arrangement that identifies the rightmost seat.

Given Data / Assumptions:

• Positions 1–6 left to right (row faces West; end labels refer to the physical row ends).
• Consecutive C–B–F in that order.
• D lies between A and C.
• E is not at the rightmost seat.

Concept / Approach:
Place C–B–F at seats 2–4 or 3–5 to allow D to be between A and C and to keep E off the right end. One valid layout is 1=E, 2=C, 3=B, 4=D, 5=A, 6=F, where D is between A and C and E avoids the right end.

Step-by-Step Solution (one valid layout):

Verification / Alternative check:
D between A (5) and C (2) holds; B is immediately right of C and left of F; E is not at the right end.

Final Answer:
F