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': 'Atrial myxoma is associated with the following except - \nSelect and explain. \nA. Fever, B. Weight loss, C. Systolic murmur at apex, D. Subungual splinter haemorrhage', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]