Vasopressin and cortisol related with following activities performed inside the body :-
(a) Vasopressin secreted from posterior adrenal gland where cortisol from ant. pitutary gland
(b) Vasopressin stimulates reabsorption of electrolytes by distal tubules and cortisol releated with maintance of cardio vascular system.
(c) Cortisol related to RBC formation where vasopressin reduces loss of water.
(d) Vasopressin is anti diuretic where cortisol is life saving substance of endocrine glands

Options

A. a and b are true where c and d are false.
B. a, b, c are true where only d is false
C. a is true where b, c, d are false
D. a is false where b, c, d are true

Answer

To solve the question regarding the activities performed by vasopressin and cortisol in the body, we will analyze each of the provided statements step by step.

### Step-by-Step Solution:

1. **Understanding Vasopressin**:
- Vasopressin, also known as antidiuretic hormone (ADH), is produced in the hypothalamus and released from the posterior pituitary gland.
- Its main functions include regulating the tonicity of body fluids and promoting water reabsorption in the kidneys, which reduces urine volume.

**Hint**: Remember that vasopressin is produced in the hypothalamus and released from the posterior pituitary.

2. **Understanding Cortisol**:
- Cortisol is a steroid hormone produced by the adrenal glands (not the pituitary gland).
- It plays a vital role in various physiological functions, including metabolism regulation, anti-inflammatory responses, and maintaining homeostasis.

**Hint**: Cortisol is produced by the adrenal glands and is involved in metabolic processes.

3. **Evaluating Option (a)**:
- The statement claims that vasopressin is secreted from the posterior adrenal gland and cortisol from the anterior pituitary gland.
- This is incorrect because vasopressin is released from the posterior pituitary and cortisol is produced by the adrenal glands.

**Hint**: Check the source of secretion for both hormones.

4. **Evaluating Option (b)**:
- This statement says that vasopressin stimulates the reabsorption of electrolytes by distal tubules and that cortisol is related to the maintenance of the cardiovascular system.
- Vasopressin does help in reabsorption of water and electrolytes, and cortisol does play a role in maintaining cardiovascular health through its effects on blood pressure and blood volume.

**Hint**: Consider the functions of both hormones in relation to the kidneys and cardiovascular system.

5. **Evaluating Option (c)**:
- The statement claims cortisol is related to RBC formation and that vasopressin reduces the loss of water.
- Cortisol does stimulate red blood cell production, and vasopressin indeed reduces water loss by promoting reabsorption in the kidneys.

**Hint**: Focus on the specific physiological roles of each hormone regarding RBC and water balance.

6. **Evaluating Option (d)**:
- This statement asserts that vasopressin is an anti-diuretic hormone and that cortisol is a life-saving substance of endocrine glands.
- This is true; vasopressin functions as an anti-diuretic, and cortisol is crucial for stress response and maintaining homeostasis.

**Hint**: Recall the definition of anti-diuretic hormone and the significance of cortisol in stress response.

### Conclusion:
- After evaluating all options:
- Option (a) is false.
- Option (b) is true.
- Option (c) is true.
- Option (d) is true.

The correct answer is that options (b), (c), and (d) are true, while option (a) is false.

### Final Answer:
The correct option is (d): Vasopressin is anti-diuretic while cortisol is a life-saving substance of endocrine glands.