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
[{'content': 'Components of comunication \nSelect and explain. \nA. Sender, B. Channel, C. Feedback, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Communication has following components:Sender (source)Receiver (Audience)Message (Content)Channel (medium)Feedback (effect)Park 23e 854', 'role': 'assistant'}]