Concept:Syllogism: Use Venn diagram or logical deduction to check conclusion validity.Explanation:Statement I: Some boys are students.Statement II: All students are engineers.From I and II, the set of "boys who are students" is a subset of students, which is a subset of engineers. Therefore, some boys are engineers. So conclusion II follows.Conclusion I says "All engineers are students." This is not given; only "all students are engineers" is true, not the reverse. So conclusion I does not follow.Answer:Only conclusion II follows.