Difficulty: Medium
Correct Answer: A
Explanation:
Introduction / Context:
This is equivalent in structure to the earlier five-house problem; we again seek the middle slot.
Given Data / Assumptions:
B < A < C; O > A; B > D.
Concept / Approach:
Construct a valid order (e.g., D, B, A, O, C) and check all relations.
Step-by-Step Solution:
In D–B–A–O–C, A occupies position 3 (middle), satisfying all constraints.
Final Answer:
A
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