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': 'Which of the following shall be seen with use of a small size BP cuff? \nSelect and explain. \nA. False elevation of BP, B. Falsely low value of BP, C. Cancels the effect of calcified aeries, D. Increases trans-arm impedance', 'role': 'user'}, {'content': 'Answer: A \nExplanation: False elevation of BP is seen with use of small cuff Blood Pressure Cuff size Bladder width >= 40% of mid-arm circumference. Bladder length 80-100% of arm circumference.', 'role': 'assistant'}]