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
[{'content': 'Host related biological propeies of a disease agent are the following except - \nSelect and explain. \nA. Virulence, B. Infectivity, C. Pathogenicity, D. Communicability', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Communicability The disease agents exhibit ceain host-related biological propeies such as infectivity, virulence, and pathogenicity.", 'role': 'assistant'}]