Statements: Irregularity is a cause for failure in exams. Some regular students fail in the examinations.
Conclusions:
1. All failed students are regular.
2. All successful students are not regular.
Answer: D
The given statement clearly implies that all irregular and some regular students fail in the examinations. This, in turn, means that all successful students are regular but not all regular students are successful. So, neither I nor II follows.