Assertion :- In monoecious plants neither autogamy nor geitonogamy can be observed.
Reason :- In monoecious plants male and female flowers produce on different plants

Options

A. A
B. B
C. C
D. D

Answer

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

### Step-by-Step Solution:

1. **Understanding Monoecious Plants**:
- Monoecious plants are those that have both male and female reproductive organs on the same individual. This means that a single plant can produce both male and female flowers.

2. **Analyzing the Assertion**:
- The assertion states that in monoecious plants, neither autogamy nor geitonogamy can be observed.
- Autogamy refers to self-pollination, where pollen from the male part fertilizes the female part of the same flower.
- Geitonogamy refers to pollination between different flowers on the same plant.
- Since monoecious plants have both male and female flowers on the same plant, both autogamy and geitonogamy can indeed occur. Therefore, the assertion is **incorrect**.

3. **Analyzing the Reason**:
- The reason states that in monoecious plants, male and female flowers produce on different plants.
- This statement is also incorrect because, by definition, monoecious plants have both male and female flowers on the same plant, not on different plants.

4. **Conclusion**:
- Since both the assertion and the reason are incorrect, the correct answer is that both the assertion and reason are false.

### Final Answer:
Both the assertion and reason are incorrect.