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': 'Which the following is not seen in a chronic case of Sickle cell anemia - \nSelect and explain. \nA. Hepatomegaly, B. Pulmonary hypertension, C. Cardiomegaly, D. Splenomegaly', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]