Question

The blood pressure of an individual is 140 mm Hg. In this statement 'Hg' refers to:

  1. Hydrogen
  2. Mercury
  3. Hygrometer
  4. Heliograph

Answer:

Option B: Mercury

Detailed Solution:

The correct answer is “Mercury”.

The "Hg" in mm Hg stands for Mercury, which is the liquid metal used in traditional sphygmomanometers (blood pressure monitors).