This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Health education & planning, Subject name: Social & Preventive Medicine
Which of the following is not a 2 way communication- 
Select and explain. 
A. Lectures, B. Group discussion, C. Panel discussion, D. Symposium
A: Lectures
Answer: A: Lectures 
Explanation: The flow of communication is one way from the communicator to the audience.The familiar example is the lecture method in class rooms.This is known as Didactic method (refer pgno:855 park 23 rd edition)