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
[{'content': 'Cause of "bloody" vomitus in a neonate - \nSelect and explain. \nA. Meckel\'s diveiculum, B. Intussusception, C. Malrotation, D. None', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is None Causes of bloody vomitus in neonates --> Stress gastritis, Hemarrhagic disease of newborn, Swallowed maternal blood', 'role': 'assistant'}]