Chemical composition of renal calculi, besides uric acid is

Options

A. Bile salts
B. Barium chloride
C. Zinc sulphate
D. Calcium oxalate

Answer

To solve the question regarding the chemical composition of renal calculi (kidney stones) besides uric acid, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Renal Calculi**:
- Renal calculi, commonly known as kidney stones, are hard deposits made of minerals and salts that form inside the kidneys.

2. **Identifying Major Components**:
- The major components of renal calculi include calcium oxalate and calcium phosphate. These are the primary constituents of most kidney stones.

3. **Considering Uric Acid**:
- Uric acid is another component that can be found in renal calculi, but the question specifically asks for components besides uric acid.

4. **Reviewing the Options**:
- The options provided are:
- A) Bile salt
- B) Barium chloride
- C) Zinc sulfate
- D) Calcium oxalate
- We need to evaluate which of these options is a known component of kidney stones.

5. **Analyzing Each Option**:
- A) Bile salt: Not related to kidney stones.
- B) Barium chloride: Not related to kidney stones.
- C) Zinc sulfate: Not related to kidney stones.
- D) Calcium oxalate: This is a major component of kidney stones.

6. **Conclusion**:
- The correct answer is D) Calcium oxalate, as it is a significant component of renal calculi besides uric acid.

### Final Answer:
The chemical composition of renal calculi, besides uric acid, is **Calcium oxalate**.

---