Which of the following instrument measures blood pressure –

Explanation

A normal human blood pressure is 120/80 mmHg. There are two stages of blood pressure in arteries. The first is called systolic pressure and the second is called diastolic pressure. Generally, systolic pressure is 120 mmHg and diastolic pressure is 80 mmHg. Doctors measure blood pressure using a sphygmomanometer. (419) ## Page 18