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
Apt test is useful for diagnosis of 
Select and explain. 
A. DIC, B. Swallowed Maternal blood, C. Haemorrhagic disease of Newborn, D. Neonatal Thrombocytopenic purpura
B: Swallowed Maternal blood
Answer: B: Swallowed Maternal blood 
Explanation: The apt test is used to differentiate fetal blood from the maternal bloodReference: Nelson Textbook of Paediatrics; 20th edition