Which one is a true fruit ?

Options

A. Walnut
B. Areca nut
C. Cashew nut
D. Ground nut

Answer

To determine which of the given options is a true fruit, we need to understand the definitions and classifications of fruits, particularly focusing on the options provided: walnut, arugula, cashew nut, and ground nut.

### Step-by-Step Solution:

1. **Understanding True Fruits**:
- A true fruit develops from the ovary of a flower after fertilization. It contains seeds and is the mature ovary of a flower. True fruits can be classified into different types based on their structure.

2. **Analyzing the Options**:
- **Walnut**:
- The walnut is not considered a true fruit; it is classified as a drupe, which is a type of stone fruit. It develops from a flower but is not a true fruit in the botanical sense.
- **Arugula**:
- Arugula is not a fruit; it is a leafy vegetable. Therefore, it cannot be a true fruit.
- **Cashew Nut**:
- The cashew is often referred to as a nut, but botanically, it is a true fruit. The cashew nut is actually a seed that develops from the cashew apple, which is the swollen peduncle of the flower. Thus, it is a true fruit.
- **Ground Nut**:
- Ground nut, also known as peanut, is a legume. It is not a true fruit; it develops from a flower but is classified as a leguminous fruit.

3. **Conclusion**:
- Among the options provided, the **cashew nut** is the only one that qualifies as a true fruit.

### Final Answer:
The true fruit among the options is **cashew nut**.

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