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
A tool for increasing consensus among a large no. of people is 
Select and explain. 
A. Delphi method, B. Chalk and talk (lecture), C. Television, D. Interpersonal communication (IPC)
A: Delphi method
Answer: A: Delphi method 
Explanation: None