More formal method of instructions, because teacher controls it:

A. One On One Discussion is less formal and involves an exchange between the teacher and learner in a personalized setting. B. Lecture is a formal method of instruction where the teacher controls the content and delivery, typically in a one-way format. C. Return Demonstration involves the patient or learner performing a task after the teacher demonstrates it. It is more interactive than a lecture. D. Group Discussion allows for interaction among participants and is less formal than a lecture, where the teacher controls the instruction.