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: Unknown
[{'content': 'Which of the following is not a direct route for transmission of communicable diseases? \nSelect and explain. \nA. Skin contact, B. Vertical, C. Droplet nuclei, D. Soil contact', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref. Foundations of Community medicine. Page. 393', 'role': 'assistant'}]