Assertion: A good vector in that whose ori support high copy number
Reason :It helps in identifying & eliminating non-transformants & permitting the growth of transformants

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion
B. It both Assertion & Reason are True but Reason is not a correct explanation of the Assetion
C. If Assertion is True but the Reason is False
D. If both Assertion & Reason are false

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "A good vector is one whose ori supports a high copy number."
- **Explanation**: In molecular biology, a vector is a DNA molecule used to carry foreign genetic material into another cell. The origin of replication (ori) is a crucial part of the vector that allows it to replicate independently within the host cell. A high copy number means that the vector can replicate many times, leading to an increased yield of the cloned DNA.

2. **Evaluating the Reason**: The reason given is "It helps in identifying & eliminating non-transformants & permitting the growth of transformants."
- **Explanation**: Transformants are cells that have taken up the foreign DNA, while non-transformants have not. Selectable markers (like antibiotic resistance genes) are used to differentiate between these two types of cells. The reason suggests that the high copy number of the vector aids in identifying and eliminating non-transformants, which is not entirely accurate.

3. **Analyzing the Relationship**:
- The assertion is true because a good vector indeed has a high copy number for effective replication.
- The reason is false because the identification and elimination of non-transformants rely on selectable markers, not directly on the high copy number of the vector.

4. **Conclusion**:
- The assertion is true, but the reason is false. Therefore, the correct answer is that the assertion is true while the reason is false.

### Final Answer:
- Assertion: True
- Reason: False