Stomata in grass leaf are

Options

A. Barrle shaped
B. rectangular
C. Kidney shaped
D. Dumb-bell shapaed

Answer

### Step-by-Step Solution:

1. **Understanding Stomata**: Stomata are small openings on the surfaces of leaves that allow for gas exchange. They are surrounded by guard cells that regulate their opening and closing.

2. **Types of Stomata**: There are primarily two shapes of stomata: dumbbell-shaped and kidney-shaped.

3. **Identifying the Shapes**:
- **Dumbbell-shaped Stomata**: This shape is typically found in grass leaves. The guard cells are shaped like a dumbbell, which allows for efficient regulation of gas exchange.
- **Kidney-shaped Stomata**: This shape is more commonly found in dicotyledonous plants.

4. **Stomata in Grass Leaves**: In the context of grass leaves, the stomata are predominantly dumbbell-shaped. This is a distinguishing feature of the stomata in monocot plants like grasses.

5. **Conclusion**: Therefore, when asked about the shape of stomata in grass leaves, the correct answer is that they are predominantly dumbbell-shaped.

### Final Answer:
Stomata in grass leaves are predominantly dumbbell-shaped.

---