Raphides are formed of

Options

A. Calcium oxalate
B. Calcium carbonate
C. Sodium choride
D. Sodium carbonate

Answer

**Step-by-Step Solution:**

1. **Understanding Raphides**: Raphides are needle-shaped crystals found in certain plant cells. They are a type of mineral crystal that plays a role in the plant's physiology.

2. **Identifying the Composition**: The options provided are calcium oxalate, calcium carbonate, sodium chloride, and sodium carbonate. We need to determine which of these is the correct composition of raphides.

3. **Analyzing the Options**:
- **Calcium Oxalate**: This is a common type of crystal found in many plants. It is known to form needle-shaped structures.
- **Calcium Carbonate**: While this is another type of mineral found in plants, it does not typically form raphides.
- **Sodium Chloride**: This is common table salt and not typically associated with plant crystal structures.
- **Sodium Carbonate**: This is also not commonly found in plant cells as a crystal structure.

4. **Conclusion**: Based on the analysis, raphides are specifically formed from calcium oxalate. This is supported by the fact that they are often found in the form of needle-shaped crystals in various plants.

5. **Final Answer**: Raphides are formed of **calcium oxalate**.

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