Solve this multiple-choice question and choose the correct option.

Data Sufficiency — Day of the week: On which day was Sahil's birthday? Statement I: Sahil celebrated his birthday the very next day after Arun's birthday. Statement II: Sahil's sister was born on the third day of the week and two days after Sahil was born. Decide which statements are sufficient to answer the question. Choose the correct sufficiency option.

Verbal Reasoning Data Sufficiency Difficulty: Easy

Choose an option

Statement I alone is sufficient, but Statement II alone is not sufficient.
Statement II alone is sufficient, but Statement I alone is not sufficient.
Both statements I and II together are sufficient, but neither alone is sufficient.
Either statement I or statement II alone is sufficient.
Even both statements I and II together are not sufficient.

Answer

Correct Answer: Statement II alone is sufficient, but Statement I alone is not sufficient.

Explanation

AssumptionWeek starts on Monday (standard in reasoning questions): Day 1 = Monday, Day 2 = Tuesday, Day 3 = Wednesday, ...

Statement IISister on the 3rd day and two days after Sahil ⇒ Sahil was born on Day 1 ⇒ Monday.

Statement IOnly relative to Arun's day; without Arun's day, cannot determine.

Final AnswerStatement II alone is sufficient, but Statement I alone is not sufficient.

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