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': 'Polycythemia is typically associated with the following haematocrit values \nSelect and explain. \nA. 60% in Men; > 55% in Women, B. 60% in Women; > 55% in Men, C. 55% in Men; > 50% in Women, D. 50% in Women; > 55% in Men', 'role': 'user'}, {'content': "Answer: A \nExplanation: Answer is A (60% in Men; > 55% in Women) A haematocrit level greater than 60% in men or greater than 55% in women is associated with an elevated RBC mass (Polycythemia) in viually every case. 'Hematocrit levels >50% in men or >45% in women may be abnormal. Hematocrit >60% in men and >55% in women are almost invariably associated with an increased red cell mass or Polycythemia' 'A Hematocrit level greater than 60% in men or greater than 55% in women is associated with an elevated RBC mass (Polycythemia) in viually every case' Note : Hematocrit levels are not included in standard diagnostic criteria for diagnosis of Polycythemia Vera", 'role': 'assistant'}]