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: Pediatrics
Antibodies to one of the following infection are not transmitted to a child – 
Select and explain. 
A. Measles, B. Pertusis, C. Diphtheria, D. Polio
B: Pertusis
Answer: B: Pertusis 
Explanation: Protective Antibodies against pertussis do not cross placenta.
So, early immunization is desired.