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
Mass media communication - 
Select and explain. 
A. Television, B. Lectures, C. Symposium, D. Radio
A: Television
Answer: A: Television 
Explanation: Mass media are a one way communication.They are useful in transmitting messages to people even in the remotest places . The number of people who are reached usually count in millions.Their effectiveness can give high returns for the time and money involved (refer pgno:866 park 23 rd edition)