Punctuality:
Being punctual is an important trait of a disciplined student. It means arriving on time for classes, meetings, and appointments. Punctuality reflects a sense of responsibility and respect for others' time. Disciplined students understand the importance of being punctual and make an effort to be on time for all their commitments.

Obeying and Respecting Others:
Another trait of a disciplined student is their ability to obey and respect others. This includes following instructions from teachers, parents, and other authority figures. Disciplined students understand that rules and guidelines are in place for a reason and adhere to them. They show respect towards their peers, teachers, and all individuals they interact with. They listen attentively, show empathy, and treat others with kindness and courtesy.

Actively Performing Tasks:
Disciplined students actively engage in their tasks and responsibilities. They take initiative and complete their assignments, homework, and projects in a timely manner. They are focused and attentive during class and participate actively in discussions and activities. They prioritize their studies and manage their time effectively, ensuring that they give ample attention to each task. Disciplined students understand the importance of putting in effort and consistently work towards achieving their goals.

Conclusion:
All of the above traits - punctuality, obeying and respecting others, and actively performing tasks - are essential for a disciplined student. These traits contribute to their personal growth, academic success, and overall development. By being punctual, disciplined students show commitment and responsibility. By obeying and respecting others, they create a positive and harmonious environment. By actively performing tasks, they demonstrate their dedication and commitment to learning. Therefore, option 'D' is the correct answer as all the mentioned traits are important for a disciplined student.