Seven friends ndash Richa Riya Rani Roma Rashi Ridhi and Ruby went for a picnic on seven days of a ...........

Logical Reasoning(Master ) Data Sufficiency

Seven friends– Richa, Riya, Rani, Roma, Rashi, Ridhi and Ruby went for a picnic on seven days of a week such that only one person went on one day.

Who went in the last?

Statement I : Only two persons went after Riya, who went just after Rashi. Ruby went immediately before Ridhi. Richa was not the first one to go for picnic.

Statement II : Nobody went before Rani. Ridhi went just just after Ruby, who went after but not immediately after Rashi. Richa went just after Rani but immediately before Rashi.

If the data in statement I alone is sufficient to answer the question, while the data in statement II alone is not sufficient to answer the question.

If the data in statement II alone is sufficient to answer the question, while the data in statement I alone is not sufficient to answer the question.

If the data either in statement I alone or in statement II alone is sufficient to answer the question.

If the data in both statement I and II together are not sufficient to answer the question.

If the data in both statement I and II together are necessary to answer the question.

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Explanation:

Statement I: Only two persons went after Riya, who went just after Rashi. Ruby went immediately before Ridhi. Richa was not the first one to go for picnic.
Statement II: Nobody went before Rani. Ridhi went just just after Ruby, who went after but not immediately after Rashi. Richa went just after Rani but immediately before Rashi.
Checking statement I:
We can have the following arrangement:
Rashi > Riya > _ > _
Ruby > Ridhi

But we cannot determine the one who went in the last..

Hence data in statement I alone is not sufficient.
Checking statement II:
We can have the following two possible arrangements:
Rani > Richa > Rashi > _ > Ruby > Ridhi > _ or
Rani > Richa > Rashi > _ > _ > Ruby > Ridhi
Thus we cannot surely determine that Ridhi went in the last.
Hence data in statement II alone is not sufficient.
Checking Both statements I and II:
We cannot make a definite arrangement with both the statements as the information that Only two persons went after Riya, who went just after Rashi clashes with the other mentioned hints.
Hence data in both statement I and II together is not sufficient to answer the question.