At a dinner party, six members (A, B, C, D, E, F) are sitting around a circular table. A is sitting next to B, but C is not sitting next to A and B. D is sitting opposite E, and E is sitting next to C. Who is sitting to the left of D?
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For circular seating arrangement problems:
\begin{itemize}
\item Fix one person to avoid rotational confusion,
\item Carefully apply adjacency and opposite conditions,
\item Assume all are facing the center unless stated otherwise.
\end{itemize}
Step 1: Arrange the six members around a circular table. Since directions are mentioned, assume everyone is facing the center.
Step 2: Place D and E opposite each other as given.
Step 3: Since E is sitting next to C, place C adjacent to E.
Step 4: A is sitting next to B, but C is not sitting next to A and B. Hence, A and B must occupy the two remaining adjacent seats not touching C.
Step 5: With this arrangement, the person sitting to the immediate left of D is A.