What is the normal range for adult blood pressure?

The normal range for adult blood pressure is considered to be from 90/60 mmHg to 120/80 mmHg. This range reflects the average pressures measured in healthy adults at rest. Blood pressure readings consist of two numbers; the first, or systolic pressure, represents the pressure in the arteries when the heart beats, while the second, or diastolic pressure, measures the pressure in the arteries when the heart is resting between beats.

Systolic values above 120 mmHg and diastolic values above 80 mmHg indicate elevated blood pressure levels, which may necessitate further evaluation or intervention. Conversely, values below 90/60 mmHg might suggest hypotension, which could lead to symptoms like dizziness or fainting in some individuals.

Each of the other ranges given in the options represent either too low or too high figures for a normal adult population, which is not consistent with widely accepted clinical guidelines.