Find out the pairs which are correctly, matched with respect to aestivation of petals
I ,Valvate-Calotropis
II. Twisted-Bean
III. Imbricate-Cassia
IV. Vexillary-China rose

Options

A. ii and iv
B. `i` and ii
C. `i` and iii
D. iii and iv

Answer

To solve the question regarding the pairs that are correctly matched with respect to the aestivation of petals, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Aestivation**: Aestivation refers to the arrangement of petals and sepals in a floral bud. It is important to know the types of aestivation and their examples to answer the question correctly.

2. **Analyzing Option I: Valvate - Calotropis**:
- Valvate aestivation occurs when petals or sepals touch each other at the edges without overlapping.
- **Example**: Calotropis is known to exhibit valvate aestivation.
- **Conclusion**: This pair is correctly matched.

3. **Analyzing Option II: Twisted - Bean**:
- Twisted aestivation involves petals overlapping each other in a regular manner, where one petal overlaps the next.
- **Example**: The correct examples for twisted aestivation include China Rose, Ladyfinger, and Cotton, not Bean.
- **Conclusion**: This pair is incorrectly matched.

4. **Analyzing Option III: Imbricate - Cassia**:
- Imbricate aestivation involves irregular overlapping of petals.
- **Example**: Cassia is known to exhibit imbricate aestivation.
- **Conclusion**: This pair is correctly matched.

5. **Analyzing Option IV: Vexillary - China Rose**:
- Vexillary (or papilionaceous) aestivation is characterized by one standard petal, two wings, and two fused keels.
- **Example**: This type is found in plants like Pea and Bean, not in China Rose.
- **Conclusion**: This pair is incorrectly matched.

### Final Conclusion:
The pairs that are correctly matched with respect to the aestivation of petals are:
- I. Valvate - Calotropis
- III. Imbricate - Cassia

Thus, the correct answer is options I and III.

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