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: Pathology
[{'content': 'A 60-year-old man with a 20-year smoking history is brought to the physician by his daughter because of altered behavior over the past week. She says that her father’s personality has changed. He has had a productive cough over the past month, for which he is taking over-the-counter medications. He is not a drug addict, diabetetic or hypertensive. Physical examination shows multiple bruises on the skin and hyper-pigmented spots on the buccal mucosa and the back of his neck. His blood pressure is 160/90 mmHg, and pulse is 70/mm. Laboratory studies show random blood sugar of 224 mg/dL, serum sodium of 140 mEq/L, serum potassium of 2.0 mEq/L, and serum bicarbonate of 27 mEq/L. \nWhich of the following tests is most likely to be abnormal in this patient? \nSelect and explain. \nA. CT chest, B. MRl brain, C. Plasma metanephrine Ievels, D. Renal Doppler', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]