Blood pressure is measured by

Options

A. barometer
B. sphygmomanometer
C. Stethoscope
D. electroencephalogram

Answer

**Step-by-Step Solution:**

1. **Understanding Blood Pressure Measurement**: Blood pressure is the force exerted by circulating blood on the walls of blood vessels. It is important to measure this to assess cardiovascular health.

2. **Identifying the Instruments**: The question provides four options for instruments that could measure blood pressure:
- A) Barometer
- B) Sphygmomanometer
- C) Stethoscope
- D) Electroencephalogram

3. **Analyzing Each Option**:
- **A) Barometer**: This instrument measures atmospheric pressure, not blood pressure.
- **B) Sphygmomanometer**: This is specifically designed to measure blood pressure. It consists of an inflatable cuff and is often used in conjunction with a stethoscope.
- **C) Stethoscope**: This instrument is used to listen to internal sounds of a body, such as heartbeats, but does not measure blood pressure by itself.
- **D) Electroencephalogram**: This is used to measure electrical activity in the brain, not blood pressure.

4. **Conclusion**: Based on the analysis, the correct instrument for measuring blood pressure is the sphygmomanometer.

5. **Final Answer**: Therefore, blood pressure is measured by **option B: sphygmomanometer**.

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