Nodulated roots occur in

Options

A. Pea
B. Wheat
C. Mustard
D. Rice

Answer

### Step-by-Step Solution:

1. **Understanding Nodulated Roots**: Nodulated roots are roots that contain nodules, which are specialized structures formed by certain plants. These nodules often house symbiotic bacteria that play a crucial role in nitrogen fixation.

2. **Identifying Leguminous Plants**: Legumes are a group of plants known for having nodulated roots. They form a symbiotic relationship with bacteria, particularly Rhizobium, which helps in fixing atmospheric nitrogen into a form that plants can utilize.

3. **Analyzing the Options**:
- **Pea**: Pea plants are legumes and are known to have nodulated roots due to the presence of Rhizobium bacteria. Therefore, this option is correct.
- **Wheat**: Wheat is a grass and does not form nodules in its roots. This option is incorrect.
- **Mustard**: Mustard plants also do not have nodulated roots. This option is incorrect.
- **Rice**: Rice is another grass that lacks nodules in its roots. This option is incorrect.

4. **Conclusion**: Based on the analysis, the only plant from the given options that has nodulated roots is the pea. Thus, the correct answer is **Pea**.

### Final Answer:
Nodulated roots occur in **Pea**.