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: Gynaecology & Obstetrics
[{'content': 'Which of the following congenital infections is associated with minimal teratogenic risk to the fetus: \nSelect and explain. \nA. HIV, B. Rubella, C. Varicella, D. CMV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: HIV infection in pregnant women has no proven teratogenic effects on the fetus. While the other three are teratogenic infections. Ref: Dutta textbook of Obstetrics 6th edition, page 299', 'role': 'assistant'}]