Read the given paragraph.
Pollination processes P, Q or R are requisite for accomplishment of sexual reproduction in plants. P does not require any external agent but Q and R do. P and help in producing purelines whereas R gives rise to offspring showing variations among themselves. Identify processes P, Q and R and select the correct option regarding these.

Options

A. Process P is possible in both unisexual and bisexual flowers.
B. Sexual reproduction in papaya and cucurbit is accomplished through processes P and Q both.
C. In case of Maple and Dandelion, wind serves as an agent for completion of process R.
D. Sunflower and Rafflesia produce bright showy flowers with nectar and odour to attract bats for completion of process Q.

Explanation

To solve the question regarding the processes of pollination P, Q, and R, we will analyze the information provided in the paragraph step by step.

### Step-by-Step Solution:

1. **Understanding Pollination**:
- Pollination is the transfer of pollen grains to the stigma of a flower, which is essential for fertilization in plants.

2. **Identifying Process P**:
- The paragraph states that process P does not require any external agent. This indicates that it is a form of pollination that occurs within the same flower.
- **Conclusion**: Process P is **Self-pollination**.

3. **Identifying Processes Q and R**:
- Both Q and R require external agents for pollination. The paragraph mentions that Q involves two flowers of the same plant, while R involves flowers from different plants.
- **Conclusion**:
- Process Q is **Cross-pollination within the same plant**.
- Process R is **Cross-pollination between different plants**.

4. **Understanding the Outcomes**:
- Process P (self-pollination) produces pure lines, meaning the offspring are genetically similar to the parent plant.
- Process R (cross-pollination) results in offspring that show variations among themselves, indicating genetic diversity.

5. **Final Identification**:
- P = Self-pollination
- Q = Cross-pollination (same plant)
- R = Cross-pollination (different plants)