Which of the following statements is not correct?

Options

A. in xerophytes stomata are of sunken tupe
B. in some monocots like doob grass guard cells are dumbbell or barbell shaped
C. the guard cells are nonliving and contain no chloroplast
D. epidermal cells also possess anthocyanin pigments tannins and different crystals

Answer

To determine which statement is not correct, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Analyze Option 1**:
- Statement: "In xerophytes, stomata are of sunken type."
- Explanation: Xerophytes are plants adapted to dry environments. They have sunken stomata to reduce water loss through transpiration. This statement is correct.

2. **Analyze Option 2**:
- Statement: "In some monocots, like bamboo, grass guard cells are dumbbell or barbell shaped."
- Explanation: Monocots, such as grasses, often have unique guard cell shapes. This statement is correct.

3. **Analyze Option 3**:
- Statement: "In some monocots, like bamboo, grass guard cells are dumbbell shaped."
- Explanation: This statement is similar to Option 2 but specifies only "dumbbell" shaped. While some monocots have dumbbell-shaped guard cells, the phrasing may not encompass all variations. However, this statement is still generally accepted as correct.

4. **Analyze Option 4**:
- Statement: "Epidermal cells also possess anthocyanin pigments, tannins, and different crystals."
- Explanation: Epidermal cells primarily serve as protective layers and do not typically contain anthocyanins, which are pigments found in certain fruits and flowers. This statement is misleading and can be considered incorrect.

### Conclusion:
The statement that is not correct is **Option 4**.