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: Psychiatry
[{'content': 'A patient was on treatment with trifluoperazine for some time. He presents with a complaint of hyperthermia, lethargy and sweating. Needed investigations are - \nSelect and explain. \nA. CT Scan brain & hemogram, B. Hemogram, Electrolyte level and creatinine, C. ECG, Chest X-ray and hemogram, D. Hemogram, CPK and renal function test', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hyperthermia, lethargy and sweating in a patient on antipsychotic (trifluoperazine) suggest the diagnosis of the neuroleptic malignant syndrome.\nThe rigidity and hyperthermia found in neuroleptic malignant syndrome contribute to muscle damage and necrosis. This can cause:-\n\n\nElevated serum creatine kinase (CK) → Serum CK level should be assessed. Assessment of elevated CK level is the most commonly used laboratory investigation for the neuroleptic malignant syndrome.\nElevated blood myoglobin (myoglobinemia) and myoglobinuria which can cause renal failure → renal function test should be done.\nLeucocytosis & thrombocytosis → Hemogram should be evaluated.', 'role': 'assistant'}]