This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
The principle of 'seeing is believing' and 'learning by doing' is up held by which method of communication 
Select and explain. 
A. Workshop, B. Demonstration, C. Lecture, D. Group discussion
B: Demonstration
Answer: B: Demonstration 
Explanation: Demonstration is presentation to show how to perform a skill or procedure.

Eg : Oris technique, Environmental sanitation.

Demonstration up holds principle of "seeing is beliving" and "learning by doing".