(A]: Somatomedin secreted by liver is also called IGF. (R)Somatomedin and somatostatin are synonyms.

Options

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

Answer

To solve the question, we need to analyze both the assertion (A) and the reason (R) statements to determine their validity.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that "Somatomedin secreted by the liver is also called IGF."
- Somatomedins are indeed proteins produced by the liver, and they are known to promote cell growth and division.
- Somatomedins are also referred to as Insulin-like Growth Factors (IGFs), which confirms that the assertion is true.

2. **Understanding the Reason (R)**:
- The reason states that "Somatomedin and somatostatin are synonyms."
- Somatostatin is a hormone that inhibits the release of growth hormone and has different functions compared to somatomedins.
- Therefore, somatomedin and somatostatin are not synonymous; they have distinct roles in the body. This makes the reason statement false.

3. **Conclusion**:
- Since the assertion (A) is true and the reason (R) is false, we can conclude that the correct answer is that the assertion is true, but the reason is false.

### Final Answer:
- Assertion (A) is true, and Reason (R) is false.