Assertion (A): In custard apple, nature favour cross-pollination.
Reason ( R): Custard apple is unisexual plant.

Options

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

Explanation

To solve the question, we need to analyze both the assertion and the reason provided.

**Step 1: Understand the Assertion**
- The assertion states that in custard apple, nature favors cross-pollination.
- Cross-pollination is the transfer of pollen from the male part of one flower to the female part of another flower.

**Step 2: Understand the Reason**
- The reason states that custard apple is a unisexual plant.
- Unisexual plants have either male or female reproductive structures, meaning they cannot self-pollinate and typically rely on cross-pollination.

**Step 3: Verify the Facts**
- In the case of custard apple (Annona squamosa), it is actually a bisexual plant, meaning it has both male and female reproductive organs in the same flower.
- Therefore, while cross-pollination can occur, it is not exclusively necessary because the plant can also self-pollinate.

**Step 4: Analyze the Relationship**
- The assertion is true because cross-pollination does occur in custard apple.
- However, the reason is false because custard apple is not unisexual; it is bisexual.

**Step 5: Conclusion**
- Based on the analysis, the correct answer is: Assertion is true, but the reason is false.

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

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