Students should prefer those teachers who

Dictate notes in the class
Give important questions before examination
Can clear their difficulties regarding subject-matter
Are themselves disciplined

The correct answer is D. Are themselves disciplined.

A teacher who is disciplined is one who is able to manage their time and workload effectively, and who is able to stay focused on the task at hand. This is important for teachers, as they often have a lot of responsibilities and need to be able to juggle multiple tasks at once. A disciplined teacher is also more likely to be organized and prepared for class, which can lead to a more effective learning environment for students.

In addition, a disciplined teacher is more likely to be able to maintain order in the classroom, which is essential for creating a positive and productive learning environment. Students are more likely to be engaged and learn effectively when they feel safe and secure in the classroom.

Finally, a disciplined teacher is more likely to be a role model for their students. Students learn by watching the adults in their lives, and a disciplined teacher can show them how to be responsible and respectful individuals.

While the other options are also important, they are not as essential as discipline. A teacher who can dictate notes, give important questions before exams, and clear students’ difficulties regarding subject-matter is certainly valuable, but a teacher who is not disciplined is unlikely to be able to effectively manage their classroom or provide a positive learning environment for their students.