[A]: Polyploidy increases the tolerance of plants towards extreme climates.
[R]: Autopolyploids produce seed less fruits.

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that polyploidy increases the tolerance of plants towards extreme climates. Polyploidy refers to a condition where an organism has more than two complete sets of chromosomes. This genetic condition can enhance a plant's ability to adapt to various environmental stresses, such as drought, cold, or salinity.

2. **Understanding the Reason**: The reason provided is that autopolyploids produce seedless fruits. Autopolyploidy occurs when an organism has multiple sets of chromosomes derived from the same species. This can lead to the development of seedless fruits, which is a desirable trait in many cultivated plants.

3. **Evaluating the Truth of the Statements**:
- The assertion is true because polyploidy does indeed increase tolerance to extreme climates.
- The reason is also true because autopolyploids can produce seedless fruits due to their genetic makeup.

4. **Determining the Relationship**: Although both statements are true, the reason does not explain the assertion. The assertion discusses the general benefits of polyploidy in terms of climate tolerance, while the reason specifically addresses a trait of autopolyploids (seedless fruits), which is unrelated to the assertion's claim about climate tolerance.

5. **Choosing the Correct Option**: Since both the assertion and the reason are true, but the reason does not serve as a correct explanation for the assertion, the correct option is that both are true, but the reason is not the correct explanation of the assertion.

**Final Answer**: The correct option is: Both assertion and reason are true, but reason is not the correct explanation of assertion.

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