This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc. (R.B.C), Subject name: Pathology
[{'content': 'KleihauerBetke test is used to detect \nSelect and explain. \nA. Ferning pattern in follicular phase, B. Cephalopelvic disproportion, C. Fetomaternal blood leak, D. Sperm-cervical mucus interaction', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. (c) Fetomaternal blood leak(Ref: Oski's Pediatrics: Principles & Practice, chapter 66; Dacie 11th/pg 307)Ring sideroblasts are not seen in sickle cell anemia, but in Sideroblastic AnemiaPeripheral smear finding in sickle cell anemia:Ansiopoikilocytosis, polychromasia, Increased Retie %Irreversibly sickle RBCs and target cells (increased after autosplenectomy).Howell-Jolly bodies due to asplenia. Q", 'role': 'assistant'}]