Correct Answer: if the data in Statements II alone are sufficient to answer the question, while the data in Statement I alone are not sufficient to answer the question. if
Explanation:
From I: Possible months: January, February, March, April, May or June.
From II: Rahul's son correctly remembers that his father went on vacation after 31st March but before 1st May. So, his father went on vacation in the month of April. Hence only II is sufficient.
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