Which of the following is correct? (A) Pars distalis produces GH.PRL TSH. ACTH LH, FSH (B) Pars intermedia secretes only one hormone called melatonin (C) Posterior lobe of pituitary is also called as neurohypophysis or pars nervosa (D) Posterior pituitary, stores and releases two hormones called oxytocin and vasopressin

Options

A. A,B,C
B. B,C,D
C. A,C,D
D. B and C

Answer

To determine which of the statements regarding the pituitary gland is correct, we will analyze each option step by step.

### Step 1: Analyze Statement A
**Statement A:** Pars distalis produces GH, PRL, TSH, ACTH, LH, FSH.

- **Explanation:** The pars distalis, also known as the anterior pituitary, is responsible for producing several hormones including Growth Hormone (GH), Prolactin (PRL), Thyroid Stimulating Hormone (TSH), Adrenocorticotropic Hormone (ACTH), Luteinizing Hormone (LH), and Follicle Stimulating Hormone (FSH).
- **Conclusion:** This statement is **correct**.

### Step 2: Analyze Statement B
**Statement B:** Pars intermedia secretes only one hormone called melatonin.

- **Explanation:** The pars intermedia is a part of the pituitary gland but does not primarily secrete melatonin. Melatonin is actually produced by the pineal gland. The pars intermedia may produce some hormones, but melatonin is not one of them.
- **Conclusion:** This statement is **incorrect**.

### Step 3: Analyze Statement C
**Statement C:** Posterior lobe of pituitary is also called neurohypophysis or pars nervosa.

- **Explanation:** The posterior lobe of the pituitary gland is indeed referred to as the neurohypophysis or pars nervosa. This part of the pituitary gland is composed of nerve tissue and is involved in the storage and release of hormones produced by the hypothalamus.
- **Conclusion:** This statement is **correct**.

### Step 4: Analyze Statement D
**Statement D:** Posterior pituitary stores and releases two hormones called oxytocin and vasopressin.

- **Explanation:** The posterior pituitary does store and release oxytocin and vasopressin (also known as antidiuretic hormone, ADH). Oxytocin is involved in childbirth and lactation, while vasopressin regulates water balance in the body.
- **Conclusion:** This statement is **correct**.

### Final Conclusion
Based on the analysis:
- Statement A is correct.
- Statement B is incorrect.
- Statement C is correct.
- Statement D is correct.

Thus, the correct answer includes statements A, C, and D.

### Correct Option
The correct option is **C (Statements A, C, and D are correct)**.

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