Who sits immediately to the left of Ravi in a row? All persons face north. Statement I: [Position constraints about some persons] Statement II: [Additional position constraints]

Statement I alone sufficient.
Statement II alone sufficient.
Either I or II alone sufficient.
Both statements I and II together necessary.

Correct answer: Both statements I and II together necessary.

Solution

Neither Statement I alone nor Statement II alone is sufficient to uniquely identify who sits to Ravi's left. Both statements together provide enough constraints to determine the full arrangement.

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