Assertion : According to Hardy - Weinberg Equilibrium , the frequency an allele remains the same generation after generation.
Reason : The only way to bring about a change in by natural selection.

Options

A. A is correct R is its explanation.
B. A and R both are correct but R is not an explanation to A
C. A is correct and R is false
D. A is false R is correct

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Assertion:**
- The assertion states that according to the Hardy-Weinberg Equilibrium, the frequency of an allele remains the same from generation to generation. This is indeed correct. The Hardy-Weinberg principle posits that allele frequencies in a population will remain constant in the absence of evolutionary influences.

2. **Understanding the Reason:**
- The reason provided claims that the only way to bring about a change in allele frequency is through natural selection. This statement is misleading. While natural selection is one of the mechanisms that can change allele frequencies, it is not the only one. Other factors such as mutation, gene flow (migration), genetic drift, and non-random mating can also affect allele frequencies.

3. **Evaluating the Assertion and Reason:**
- Since the assertion is true (allele frequencies remain constant under Hardy-Weinberg conditions), but the reason is false (there are multiple factors that can change allele frequencies, not just natural selection), we conclude that:
- Assertion (A) is correct.
- Reason (R) is false.

4. **Final Conclusion:**
- The correct relationship is that the assertion is true, but the reason is false. Therefore, the answer is that Assertion is correct and Reason is false.