This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
[{'content': 'Weight in kg is \nSelect and explain. \nA. Normal variable, B. Discrete variable, C. Confounding variable, D. Continuous variable', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A continuous variable is a variable that has an infinite number of possible values. (ex: weight in Kgs - 48.6, 47.23.etc ) A discrete variable is a variable that can only take on a ceain number of values. (Ex: Number of doctors in a clinic - 5, 11..etc) Ref : Park 23rd edition Pgno : 73', 'role': 'assistant'}]