Which of the following present in soil has the smallest sized rock particles ?

Options

A. gravel
B. silt
C. clay
D. sand

Answer

To determine which of the following present in soil has the smallest sized rock particles, we can analyze the different types of soil components mentioned: gravel, silt, clay, and sand.

### Step-by-Step Solution:

1. **Identify the Types of Soil Particles**:
- The four types of soil particles we need to consider are gravel, silt, clay, and sand.

2. **Analyze Gravel**:
- Gravel consists of large rock particles. It is known for having the largest size among soil components. Therefore, it cannot be the answer.

3. **Analyze Silt**:
- Silt contains medium-sized rock particles. While it is smaller than gravel, it is still larger than clay. Thus, silt is not the smallest.

4. **Analyze Sand**:
- Sand has larger particles compared to silt and is coarser. It allows water to drain quickly, which means it also cannot be the smallest.

5. **Analyze Clay**:
- Clay consists of very fine particles, often at the nano scale. These particles are much smaller than those in gravel, silt, or sand. Clay can hold water effectively due to its small particle size.

6. **Conclusion**:
- Based on the analysis, the smallest sized rock particles present in soil are found in clay.

### Final Answer:
The smallest sized rock particles in soil are found in **clay**.

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