Assertion (A) : The milk of transgenic cow Rosie was nutritionally more balanced than normal cow milk
Reason (R) : `alpha`-1 antitrypsin is a biological product produced by transgenic animals

Options

A. Both A and R are true, R is correct explanation for A
B. Both A and R are true, R is not correct explanation for A
C. A is true but R is false
D. A is false but R is true

Answer

To solve the assertion and reason question, we need to analyze both the assertion (A) and the reason (R) provided.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that the milk of transgenic cow Rosie was nutritionally more balanced than normal cow milk.
- Rosie was indeed the first transgenic cow, and her milk was genetically modified to contain a human protein called alpha-lactalbumin, which enhances the nutritional profile of the milk.
- Therefore, the assertion is **true**.

2. **Understanding the Reason (R)**:
- The reason states that alpha-1 antitrypsin is a biological product produced by transgenic animals.
- Alpha-1 antitrypsin is a protein that can be produced by transgenic animals, including transgenic sheep.
- While this statement is also **true**, it is important to note that it does not directly explain why Rosie’s milk is more nutritionally balanced. Rosie’s milk is enhanced by alpha-lactalbumin, not alpha-1 antitrypsin.

3. **Conclusion**:
- Both the assertion (A) and the reason (R) are true.
- However, the reason (R) does not correctly explain the assertion (A) because it refers to a different protein (alpha-1 antitrypsin) that is not related to the nutritional enhancement of Rosie’s milk.
- Therefore, the correct answer is: **Both A and R are true, but R is not the correct explanation for A**.

### Final Answer:
The correct option is: **Both A and R are true, but R is not the correct explanation for A**.

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