Reena was experiencing headache and dizziness for the last few days . When visited a clinic, the doctor informed that her blood pressure is high. Which of the following hormones will be secretad in body to reduce the blood pressure ?
I. Aldosterone
II. Cortisol
III. Atrial Natriuretic factor
IV. Erythropoietin

Options

A. I only
B. I and II
C. III only
D. I and III

Answer

To solve the question regarding which hormone will be secreted in the body to reduce blood pressure, we need to analyze the functions of each of the hormones listed:

1. **Aldosterone**:
- Aldosterone is a hormone produced by the adrenal glands. Its primary function is to promote the reabsorption of sodium and water in the kidneys. This leads to an increase in blood volume, which consequently raises blood pressure. Therefore, aldosterone does not reduce blood pressure.

2. **Cortisol**:
- Cortisol is a glucocorticoid hormone also produced by the adrenal glands. It primarily helps in increasing blood glucose levels and has anti-inflammatory effects. While it plays a role in stress response, it does not have a direct effect on reducing blood pressure. Thus, cortisol is not the correct answer.

3. **Atrial Natriuretic Factor (ANF)**:
- ANF is a hormone secreted by the atria of the heart. Its main function is to promote the excretion of sodium through the urine (natriuresis) and to inhibit the renin-angiotensin-aldosterone system, which leads to a decrease in blood volume and blood pressure. Therefore, ANF is the hormone that reduces blood pressure.

4. **Erythropoietin**:
- Erythropoietin is a hormone produced by the kidneys that stimulates the production of red blood cells (RBCs). Its primary role is related to oxygen transport in the blood and does not have a direct effect on blood pressure regulation. Therefore, erythropoietin is not the correct answer.

Based on the analysis, the hormone that will be secreted in the body to reduce blood pressure is **Atrial Natriuretic Factor (ANF)**.

### Final Answer:
**III. Atrial Natriuretic Factor**