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': 'The commonest side effect of cisplatinum in a patient using it for esophageal carcinoma is \nSelect and explain. \nA. Acute tubular necrosis, B. Thrombocytopenia, C. Hepatic failure, D. Cardiomyopathy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]