Assertion :- Vasopressin is a neurohormone
Reason:- Vasopressin is synthesized by pars nervosa of pituitary gland

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that "Vasopressin is a neurohormone." We need to confirm if this statement is true. Vasopressin, also known as antidiuretic hormone (ADH), is indeed classified as a neurohormone because it is produced in the hypothalamus and released into the bloodstream from the posterior pituitary gland.

2. **Analyzing the Reason**: The reason states that "Vasopressin is synthesized by the pars nervosa of the pituitary gland." Here, we need to evaluate the accuracy of this statement. The pars nervosa is part of the posterior pituitary, but vasopressin is not synthesized there. Instead, it is synthesized in the hypothalamus and then transported to the posterior pituitary for storage and release.

3. **Conclusion**: Since the assertion is true (vasopressin is a neurohormone), but the reason is false (vasopressin is synthesized in the hypothalamus, not the pars nervosa), we conclude that the assertion is correct while the reason is incorrect.

4. **Final Answer**: The correct option is that the assertion is true, but the reason is false.