A: Dolly was the first mammal to be cloned from an mammary cell.
R: To create, Dolly the finn dorset ewe, lan Wilmut and Keith Campbell used aid from two mothers.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1 )
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).
C. If Assertion is true statement but Reason is false, then mark (3).
D. If both Assertion and Reason are false statements, then mark (4).

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Dolly was the first mammal to be cloned from a mammary cell."
- This statement is true. Dolly the sheep was indeed the first mammal to be cloned from a somatic (mammary) cell.

2. **Understanding the Reason**:
- The reason states that "to create Dolly, the Finn Dorset ewe, Ian Wilmut and Keith Campbell used aid from two mothers."
- This statement is false. In fact, three mothers were involved in the cloning process.

3. **Identifying the Mothers**:
- The first mother provided the mammary cell (the Finn Dorset ewe).
- The second mother provided the egg cell (the Scottish Blackface ewe).
- The third mother acted as the surrogate, carrying Dolly to term.

4. **Conclusion**:
- Since the assertion is true and the reason is false, the correct conclusion is that the assertion is true but the reason is false.

### Final Answer:
The assertion is true, but the reason is false.