This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
[{'content': 'A 55yr old male patient with his HTN on ACE inhibitors and has CABG four years back is scheduled for hernia surgery He has good effo tolerance which of the following pre-op investigations are ordered \nSelect and explain. \nA. Routine preop evaluation + Routine preop evaluation, B. Routine preop +clinical+stress testing, C. Routine preop + clinical +angiography to look for potency, D. Routine preop + clinical exam +V/Q scan', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ref : willey 10th ed', 'role': 'assistant'}]