Which one shows trifoliate imparipinnate compound leaf?
(a) Dolichos
(b) Hardwickia
(c) Marsilea
(d) Oxalis

Options

A. Dolichos
B. Hardwickia
C. Marsilea
D. Oxalis.

Answer

To determine which plant shows a trifoliate imparipinnate compound leaf, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Trifoliate**: This means that the leaf has three leaflets.
- **Imparipinnate**: This indicates that the leaf has an odd number of leaflets. In an imparipinnate leaf, there is one leaflet at the tip and an even number of leaflets on either side of the rachis.

2. **Analyzing the Options**:
- **(a) Dolichos**: This plant is known to have trifoliate imparipinnate compound leaves. It has three leaflets arranged in a way that fits the definition.
- **(b) Hardwickia**: This plant has a peripinnate leaf structure, which means it has an even number of leaflets, thus it does not fit the criteria.
- **(c) Marsilea**: Similar to Hardwickia, Marsilea also exhibits a peripinnate leaf structure and does not have trifoliate imparipinnate leaves.
- **(d) Oxalis**: Oxalis has a trifoliate leaf structure, but it is also peripinnate, meaning it does not meet the imparipinnate requirement.

3. **Conclusion**:
- After analyzing all the options, we find that only **(a) Dolichos** shows a trifoliate imparipinnate compound leaf.

### Final Answer:
The correct answer is **(a) Dolichos**.

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