The blood pressure values of four persons are given below
(i) Mr. A 120/80 mm Hg
(ii)Mr. B 80/120 mm Hg
(iii) Mrs A 90/80 mm Hg
(iv) Mrs. B 150/80 mm Hg
Who among the following has normal blood pressure ?

Options

A. Mr. A
B. Mr. B
C. Mrs. A
D. Mrs. B

Answer

To determine who among the four individuals has normal blood pressure, we need to analyze the provided blood pressure values against the standard normal range.

### Step-by-Step Solution:

1. **Understand Normal Blood Pressure Values**:
- Normal blood pressure is typically defined as less than 120/80 mm Hg.
- The systolic pressure (the first number) should be less than 120 mm Hg, and the diastolic pressure (the second number) should be less than 80 mm Hg.

2. **Evaluate Each Person's Blood Pressure**:
- **Mr. A**: 120/80 mm Hg
- This is at the upper limit of normal blood pressure.
- **Mr. B**: 80/120 mm Hg
- This is considered abnormal as the systolic pressure (120 mm Hg) is above normal.
- **Mrs. A**: 90/80 mm Hg
- This is within the normal range.
- **Mrs. B**: 150/80 mm Hg
- This is considered high blood pressure as the systolic pressure (150 mm Hg) is well above normal.

3. **Determine Who Has Normal Blood Pressure**:
- Based on the analysis:
- Mr. A (120/80 mm Hg) is at the upper limit of normal.
- Mr. B (80/120 mm Hg) has abnormal blood pressure.
- Mrs. A (90/80 mm Hg) has normal blood pressure.
- Mrs. B (150/80 mm Hg) has high blood pressure.
- Therefore, both Mr. A and Mrs. A are within the normal range, but Mr. A is at the upper limit.

4. **Conclusion**:
- The individuals with normal blood pressure are Mr. A and Mrs. A. However, if the question asks for one person, Mr. A is the most commonly recognized as having normal blood pressure.

### Final Answer:
- **Mr. A** has normal blood pressure.