Inulin and raphide crystals are which type of plant products ?

Options

A. (a) Excretory
B. (b) Inorganic
C. (c) Respiratory
D. (d) Reserve material

Answer

### Step-by-Step Solution:

1. **Understanding Inulin**:
- Inulin is a type of carbohydrate that serves as a storage form of energy in plants. It is primarily found in the form of polysaccharides and is utilized by plants to store energy and regulate cold resistance.
- **Examples**: Common plants that contain inulin include wheat, onions, and bananas.

2. **Understanding Raphide Crystals**:
- Raphide crystals are needle-shaped structures composed of calcium oxalate. These crystals are typically found in the idioblasts of parenchyma tissue within plants.
- **Function**: Raphide crystals serve as a defense mechanism against herbivores, deterring animals from feeding on the plants due to their sharp structure.
- **Examples**: Plants that contain raphide crystals include kiwifruit, spinach, lettuce, and pineapple.

3. **Categorizing Inulin and Raphide Crystals**:
- Both inulin and raphide crystals are classified as reserve materials in plants. They are involved in energy storage and serve protective functions.
- **Conclusion**: Given the options provided, the correct classification for both inulin and raphide crystals is "reserve material".

4. **Final Answer**:
- Therefore, the correct answer to the question is that inulin and raphide crystals are types of **reserve materials** in plants.