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
Which of the following immunoglobulin crosses placenta: September 2011, March 2013 
Select and explain. 
A. IgA, B. IgM, C. IgG, D. IgD
C: IgG
Answer: C: IgG 
Explanation: Ans. C: IgG IgG is the only maternal immunoglobulin that is normally transpoed across the placenta and provides natural passive immunity to the newborn