Concept:Systolic blood pressure measures the maximum pressure in arteries when the heart contracts, and its normal value is defined by global medical standards.
Explanation:The normal systolic pressure in a healthy adult is 120 mm of Hg.
This is the upper number in a blood pressure reading (e.g., 120/80 mm Hg).
A reading below 120 mm Hg is also considered normal, but 120 mm Hg is the standard reference.
Systolic pressure below 90 mm Hg may indicate hypotension, while consistently high readings (≥130 mm Hg) signal hypertension.
Thus, among the given options, only 120 mm Hg matches the universally accepted normal systolic value.
Answer:C. 120 mm of Hg