Geocarpic fruits are produced by

Options

A. Watermelon
B. Onion
C. Carrot
D. Ground nut

Answer

### Step-by-Step Solution:

1. **Understanding Geocarpic Fruits**:
- Geocarpic fruits are those that develop and ripen below the surface of the ground. This is a unique characteristic that distinguishes them from other types of fruits.

2. **Identifying the Options**:
- The options given are watermelon, onion, carrot, and groundnut. We need to analyze which of these produces geocarpic fruits.

3. **Analyzing Each Option**:
- **Watermelon**: This fruit grows above the ground and is not geocarpic.
- **Onion**: This is a bulb and does not produce fruits in the geocarpic manner.
- **Carrot**: Similar to onion, it is a root vegetable and does not produce geocarpic fruits.
- **Groundnut**: Also known as peanut, it is known for its unique growth habit where the fruit develops underground.

4. **Understanding the Growth Mechanism of Groundnut**:
- After pollination, the flower of the groundnut develops a stalk-like structure called a "peg." This peg grows downwards into the soil, carrying the fertilized ovules with it. Once the peg is below the soil surface, it develops into the pod that contains the seeds.

5. **Conclusion**:
- Based on the analysis, groundnut is the only option that produces geocarpic fruits as it ripens beneath the surface of the ground.

### Final Answer:
- **Groundnut** is the correct answer as it produces geocarpic fruits.

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