Statement:
Most students in the class passed the exam.

Conclusions:
I. Some students failed the exam.
II. All students appeared for the exam.

Correct Answer: Only I follows

Step-by-Step Explanation:

1. Analyzing the Given Statement:
The statement mentions: "Most students in the class passed the exam."
The word "Most" means a majority (more than 50%, but not 100%) of the students passed the exam. This implies that while a large portion passed, the remaining portion of students did not pass (i.e., they failed).

2. Evaluating Conclusion I:
"Some students failed the exam."
Since "most" implies not all students passed, it logically follows that the rest of the students in the class failed the exam. Therefore, Conclusion I follows.

3. Evaluating Conclusion II:
"All students appeared for the exam."
The statement only provides information about the performance of students who took the exam (or the general status of passing/failing in the class). It does not explicitly mention whether every single student enrolled in the class actually appeared for the exam or if some were absent. Therefore, Conclusion II does not follow.

Conclusion:
Only Conclusion I logically follows from the given statement.