Assertion (A) : The Offspring of a cross made between the plants having two contrasting characters shows only one character without any blending.
Reason ( R): The factor controlling any character is discrete and independent.

Options

A. Both assertion (A) and reason ( R) are true and reason ( R) is the correct explanation of assertion (A).
B. Both assertion (A) and reason ( R) are true but reason ( R) is not the correct explanation of assertion (A).
C. Assertion (A) is true but reason ( R) is false.
D. Assertion (A) is false but reason ( R) is true.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Assertion (A):** The assertion states that when two plants with contrasting traits are crossed, the offspring exhibit only one of the traits without any blending. This is indicative of a dominant-recessive relationship between the traits.

2. **Understanding the Reason (R):** The reason provided explains that the factors (or alleles) controlling these traits are discrete and independent. This means that each trait is controlled by a separate factor, and during the formation of gametes, these factors segregate.

3. **Relating Assertion and Reason:** The assertion is supported by the reason because the discrete nature of alleles leads to the expression of only one trait in the offspring (the dominant trait) when two contrasting traits are present. This is consistent with Mendel's law of segregation, which states that alleles segregate independently during gamete formation.

4. **Evaluating the Options:** Based on the analysis:
- Both the assertion and reason are correct.
- The reason correctly explains the assertion.

5. **Conclusion:** Therefore, the correct answer is that both assertion and reason are correct, and the reason is a correct explanation of the assertion.

**Final Answer:** Both assertion and reason are correct, and the reason is a correct explanation of the assertion.

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