This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
Which of the following is not true about measurement of blood pressure? 
Select and explain. 
A. The bladder of the blood pressure cuff should cover more than 80% of the arm cricumference, B. The blood pressure cuff should be at a higher level than the hea, C. Patient should be in resting position, D. Cuff should be tied over upper arm
B: The blood pressure cuff should be at a higher level than the hea
Answer: B: The blood pressure cuff should be at a higher level than the hea 
Explanation: Cuff and manometer should be at hea level so that the effect of gravity on blood pressure can be avoided. If above the hea level the pressure is found to be increased and if it is below it found to be decreased. Ref: Textbook of medical physiology by N Geetha, 3rd edition, page no. 195