This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pediatrics, environment and nutrition, Subject name: Pathology
[{'content': "The most common malignant neoplasm of infancy is - \nSelect and explain. \nA. Malignant teratoma, B. Neuroblastoma, C. Wilms' tumor, D. Hepatoblastoma", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Robbins basic pathology. 7th edition. page no. 500. Chapter diseases of infancy and childhood. Neuroblastoma is the second most common solid malignancy after brain tumours. It accounted as much as 50% of neonatal malignancies.', 'role': 'assistant'}]