Male and femal flowers are present on different plants (dioecious) to ensure xenogamy, in

Options

A. papaya
B. bottle gourd
C. maiza
D. all of these

Explanation

To determine which plant has male and female flowers on different plants (dioecious) to ensure xenogamy, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Dioecious**: Plants that have male and female reproductive organs on separate individuals.
- **Xenogamy**: A type of pollination where pollen is transferred from the male flower of one plant to the female flower of another plant of the same species.

2. **Identify the Options**:
- The options provided are:
- A) Papaya
- B) Bottle Gourd
- C) Maize
- D) All of these

3. **Analyze Each Option**:
- **Papaya**: This plant is dioecious, meaning it has separate male and female plants. Therefore, it can ensure xenogamy.
- **Bottle Gourd**: This plant is monoecious, meaning it has both male and female flowers on the same plant. This leads to self-pollination rather than xenogamy.
- **Maize**: Like bottle gourd, maize is also monoecious, with both male (tassels) and female (ears) flowers on the same plant, allowing for self-pollination.
- **All of these**: This option cannot be correct since not all the listed plants are dioecious.

4. **Conclusion**:
- Since only papaya is dioecious and ensures xenogamy, the correct answer is **A) Papaya**.

### Final Answer:
The correct answer is **A) Papaya**.