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': 'Which of the following is not a method of transmission of infection through direct contact? \nSelect and explain. \nA. Syringe and needle, B. Kissing, C. Sexual Intercourse, D. Transplacental', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]