Which description best defines normal blood pressure?

• A. Systolic <120 and Diastolic <80
• B. Systolic 120-129 and Diastolic <80
• C. Systolic ≥140 or Diastolic ≥90
• D. Systolic 130-139 or Diastolic 80-89

Answer: (A)

Normal blood pressure means the systolic pressure is below 120 and the diastolic pressure is below 80. This range indicates the heart is pumping with enough force to supply organs without putting extra wear on the vessels. The numbers reflect two phases of the heartbeat: systolic pressure is the peak pressure when the heart contracts, while diastolic is the pressure when the heart rests between beats. Keeping both values under 120/80 helps minimize risk for long‑term damage to vessels and organs.

The other descriptions describe higher blood pressure categories. Systolic 120–129 with diastolic under 80 is considered elevated, not normal. Systolic 130–139 or diastolic 80–89 fits the Stage 1 hypertension range, and systolic 140 or diastolic 90 and above is Stage 2 hypertension. These patterns indicate progressively greater cardiovascular risk and usually warrant closer monitoring and potential treatment.