Explanation:
TEACHER
A teacher is a person who helps students to acquire knowledge, competence or virtue. Informally the role of teacher may be taken on by anyone.
Doctor
A physician, medical practitioner, medical doctor, or simply doctor, is a professional who practices medicine, which is concerned with promoting, maintaining, or restoring health through the study, diagnosis, prognosis and treatment of disease, injury, and other physical and mental impairments.
