Heterostyly as a contrivance for cross-pollination is found in

Options

A. Pennisetum
B. Impatiens
C. Primula bulgaris
D. Oenothera

Explanation

To answer the question "Heterostyly as a contrivance for cross-pollination is found in?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand Heterostyly**:
- Heterostyly refers to the presence of different lengths of styles within the same species of flowering plants. This variation in style length is associated with the position of the stamens (the male reproductive part) and promotes cross-pollination.

2. **Identify Style Types**:
- In heterostylous plants, there are typically two types of flowers:
- **Pin-eyed flowers**: These have long styles and short stamens.
- **Thrum-eyed flowers**: These have short styles and long stamens.

3. **Examine the Options**:
- The question provides four options:
- A) Panicum
- B) Impatiens
- C) Primula vulgaris
- D) Oinotherapy

4. **Determine the Correct Answer**:
- Among the options, **Primula vulgaris** is known to exhibit heterostyly. This plant has both pin-eyed and thrum-eyed flowers, which facilitates cross-pollination by ensuring that pollen from one type of flower can effectively reach the stigma of another type.

5. **Conclusion**:
- Therefore, the correct answer to the question is **C) Primula vulgaris**.