This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pediatrics
[{'content': 'Apt test is useful for diagnosis of \nSelect and explain. \nA. DIC, B. Swallowed Maternal blood, C. Haemorrhagic disease of Newborn, D. Neonatal Thrombocytopenic purpura', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The apt test is used to differentiate fetal blood from the maternal bloodReference: Nelson Textbook of Paediatrics; 20th edition', 'role': 'assistant'}]