The normal systolic and diastolic pressure in humans is, respectively.

Correct option is B

The correct answer is120 and 80 mm of Hg.

Explanation:
In humans, normal blood pressure is measured in terms of systolic pressure (the pressure when the heart contracts) and diastolic pressure (the pressure when the heart is at rest between beats). The normal range for blood pressure is typically expressed as:

• Systolic pressure (when the heart contracts) = 120 mmHg
• Diastolic pressure (when the heart is at rest) = 80 mmHg

So, the normal blood pressure is 120/80 mmHg.

Key Points:

• Systolic pressure represents the maximum pressure exerted on the arteries when the heart beats.
• Diastolic pressure represents the minimum pressure when the heart rests between beats.
• Blood pressure above 140/90 mmHg is generally considered high blood pressure (hypertension), and below 90/60 mmHg may be considered low blood pressure (hypotension).