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: Medicine
[{'content': 'Auto haemolysis test is positive in - \nSelect and explain. \nA. Beta thalessemia, B. Hereditary spherocytosis, C. Vit E deficiency, D. Sickle cell disease', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]