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
Most frequent cause of neonatal thrombocytopenic purura is – 
Select and explain. 
A. Infection, B. Drug idiosyncrasy, C. Large haemangiomas, D. Erythroblastosis
A: Infection
Answer: A: Infection 
Explanation: Amongst the given options, only infection causes neonatal thrombocytopenia