The correct answer is: A. Only conclusion I follows.
The statement says that any student who does not behave properly while in the school brings bad name to himself and also for the school. This does not mean that stricter discipline does not improve behaviour of the students. It is possible that stricter discipline can improve the behaviour of students, but it is also possible that it will not. The statement does not provide enough information to make a conclusion about whether or not stricter discipline will improve the behaviour of students.
Conclusion I follows from the statement because the statement says that any student who does not behave properly while in the school brings bad name to himself and also for the school. Therefore, it is reasonable to conclude that such student should be removed from the school.
Conclusion II does not follow from the statement because the statement does not say anything about whether or not stricter discipline will improve the behaviour of students. Therefore, it is not reasonable to conclude that stricter discipline does not improve behaviour of the students.