Assertion: Cross-pollination results in healthy and stronger
offspring.
Reason: Due to phenomenon of hybrid vigour.

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding Cross-Pollination:**
- Cross-pollination is defined as the transfer of pollen from the anther of one flower to the stigma of another flower of the same species. This process involves two different flowers, which means that the offspring produced will have genetic contributions from two distinct parental sources.

2. **Genetic Variation:**
- Since cross-pollination involves two different parents, the offspring will inherit a combination of genetic material from both. This genetic diversity leads to variations in the offspring, which can enhance their adaptability and survival.

3. **Hybrid Vigor:**
- The phenomenon of hybrid vigor (or heterosis) refers to the improved or increased function of any biological quality in a hybrid offspring. This is often observed when two genetically diverse parents are crossed, resulting in offspring that are healthier, stronger, and more resilient than either parent.

4. **Assertion and Reason Analysis:**
- The assertion states that cross-pollination results in healthy and stronger offspring, which is true due to the genetic diversity it introduces.
- The reason given is that this occurs due to the phenomenon of hybrid vigor, which is also true as hybrid vigor explains why the offspring are superior.

5. **Conclusion:**
- Both the assertion and reason are true, and the reason correctly explains the assertion. Therefore, the correct answer is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

**Final Answer:**
- The correct answer is A: Both assertion and reason are true, and the reason is the correct explanation of the assertion.

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