Raphides are needle-like crystals of calcium oxalate which are specially found in

Options

A. (a) Dahlia
B. (b) Pistia
C. (c) Asparagus
D. (d) All of the above

Answer

### Step-by-Step Solution:

1. **Understanding Raphides**: Raphides are needle-like crystals composed of calcium oxalate. They are a type of crystal found in certain plant tissues.

2. **Location of Raphides**: These raphides are specifically located in specialized cells known as idioblasts. Idioblasts are found within the parenchyma tissue of plants.

3. **Function of Raphides**: The primary function of raphides is to provide protection to the plant against herbivores and other animals. The sharp crystals can deter animals from eating the plant.

4. **Examples of Plants with Raphides**: Some common examples of plants that contain raphides include:
- Kiwifruit
- Spinach
- Lettuce
- Certain varieties of lilies
- Pineapple

5. **Analyzing the Options**: The question provides multiple-choice options:
- A) Dahlia
- B) Pistia (scientific name for lettuce)
- C) Asparagus
- D) All of the above

6. **Identifying the Correct Answer**:
- Option A (Dahlia) does not typically contain raphides.
- Option B (Pistia) is indeed a scientific name for lettuce, which is known to contain raphides.
- Option C (Asparagus) does not have raphides.
- Option D (All of the above) is incorrect since not all listed options contain raphides.

7. **Conclusion**: The correct answer is **B) Pistia**, as it is specifically known to contain raphides.