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
What is false about pertussis -a) Maternal antibody provides protection in infantsb) Fomites play a small role in spread of diseasec) Commonly seen in infantsd) Males and females both are equally affected 
Select and explain. 
A. b, B. ad, C. ac, D. ab
B: ad
Answer: B: ad 
Explanation: None