Nonfunctional stomata can be seen in

Options

A. mango leaf
B. Pea leaves
C. Hydrilla
D. Lotus

Answer

### Step-by-Step Solution:

1. **Understanding Stomata Function**: Stomata are small openings on the surface of leaves that allow for gas exchange (CO2 in, O2 out) and transpiration (loss of water vapor). They play a crucial role in the plant's ability to perform photosynthesis and regulate water loss.

2. **Analyzing the Options**:
- **Mango**: This is a tall angiosperm tree. It has stomata on both the upper and lower surfaces of its leaves, which are functional for transpiration.
- **Pea**: Pea plants also have functional stomata on their leaves, allowing for transpiration and gas exchange.
- **Lotus**: Lotus plants have leaves that float on water, and their stomata are located on the upper surface, which allows for gas exchange and some transpiration.
- **Hydrilla**: This is an aquatic plant that is completely submerged in water. Since it is underwater, it does not undergo transpiration, leading to non-functional stomata.

3. **Conclusion**: Among the given options, the plant that has non-functional stomata is **Hydrilla** because it is entirely submerged in water, preventing transpiration.

### Final Answer:
Non-functional stomata can be seen in **Hydrilla**.

---