This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypeension, Subject name: Medicine
[{'content': 'A patient with recent loss of hypeension control and creatinine- 4.2 mg/dL. Renal USG shows size discrepancy in kidneys and no sign of obstruction .What should be the next investigation ? \nSelect and explain. \nA. IVP, B. MR angiography, C. Retrograde pyelography, D. Ultasound Doppler', 'role': 'user'}, {'content': 'Answer: D \nExplanation: As patient has history of loss of control of hypeension and raised creatinine , Renal USG is warranted . USG findings and clinical history raise suspicion of Renovascular hypeension . Next Investigation of choice is Ultrasound Doppler as it confirms diagnosis of Renovascular hypeension in vasculature .', 'role': 'assistant'}]