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: Microbiology
[{'content': 'Which of the following immunoglobulin crosses placenta: September 2011, March 2013 \nSelect and explain. \nA. IgA, B. IgM, C. IgG, D. IgD', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: IgG IgG is the only maternal immunoglobulin that is normally transpoed across the placenta and provides natural passive immunity to the newborn', 'role': 'assistant'}]