Assertion (A): Dihybrid cross is the only way to study the law of independent assortment.
Reason ( R): Only Linked genes can demonstrate the law of independent assortment.

Options

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

Explanation

To analyze the given statements, we need to break down the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that "Dihybrid cross is the only way to study the law of independent assortment."
- A dihybrid cross involves two traits, each represented by two alleles. For example, if we consider traits such as flower color (purple vs. white) and seed shape (round vs. wrinkled), a dihybrid cross will show how these traits assort independently during gamete formation.

2. **Understanding the Reason (R)**:
- The reason states that "Only linked genes can demonstrate the law of independent assortment."
- Linked genes are genes that are located close to each other on the same chromosome and tend to be inherited together. Because they are linked, they do not assort independently during gamete formation, which contradicts the law of independent assortment.

3. **Analyzing the Truth Values**:
- The assertion (A) is **true** because a dihybrid cross does indeed illustrate the law of independent assortment.
- The reason (R) is **false** because linked genes do not demonstrate the law of independent assortment; instead, they violate it.

4. **Conclusion**:
- Since the assertion is true and the reason is false, the correct interpretation of the statements is that the assertion stands alone as true, while the reason does not support it.

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