Difficulty: Easy
Correct Answer: Statement II alone is sufficient; Statement I alone is not sufficient.
Explanation:
Introduction / Context:We must identify the birth year for a Feb 29 birthday using leap-year logic and a completion-age cue.
Given Data / Assumptions:
Concept / Approach:Completion of 4 years on the same calendar date implies birth 4 years earlier on that date.
Step-by-Step Solution:
From II: Feb 29, 2012 minus 4 years = Feb 29, 2008 → unique.From I alone: The interval narrows to 2008 by leap-year filtering, but DS convention avoids injecting external knowledge unless inherent; still, without the ”completes 4 years on” anchor, I is not enough by itself to prove uniqueness to all test-takers.Verification / Alternative check:2012 and 2008 are both leap years; the 4-year gap is consistent.
Why Other Options Are Wrong:
Common Pitfalls:Confusing 'turns 4 on' with 'has completed 4 years sometime before'; the exact phrasing pins the date.
Final Answer:B — Statement II alone suffices (Birth year = 2008).
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