Which pair represents atmospheric pressure in both mmHg and cm H2O?

• A. 0 mmHg / 0 cm H2O
• B. 760 mmHg / 1034 cm H2O
• C. -5 cm H2O / 10 cm H2O
• D. 1034 cm H2O / 760 mmHg

Answer: (B)

Atmospheric pressure at sea level is defined as 760 mmHg, and the same pressure is about 1034 cm H2O because 1 cm H2O ≈ 0.7356 mmHg. So 1034 cm H2O corresponds to roughly 760 mmHg. The pair showing 760 mmHg and 1034 cm H2O represents the same pressure written in the two units, which is why it’s the correct choice. The other options either give zero, a negative value, or present the units in a way that doesn’t consistently reflect atmospheric pressure in both units.