The yellow colour of urine is due to the presence of

Options

A. Uric acid
B. Urea
C. Urochrome
D. Melanin

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the reason for the yellow color of urine. This indicates that we need to identify the pigment or substance responsible for this coloration.

2. **Identifying Possible Options**: The options given are:
- A) Uric acid
- B) Urea
- C) Urochrome
- D) Melanin

3. **Analyzing Each Option**:
- **Uric Acid**: This is a waste product formed from the breakdown of purines, but it does not contribute to the yellow color of urine.
- **Urea**: This is the main nitrogenous waste product in urine, formed from the breakdown of proteins, but it is colorless and does not impart yellow color.
- **Urochrome**: This is a pigment that is responsible for the yellow color of urine. It is produced from the breakdown of hemoglobin in red blood cells.
- **Melanin**: This is a pigment found in skin, hair, and eyes, but it is not involved in the coloration of urine.

4. **Conclusion**: The correct answer is **C) Urochrome**. This pigment is also known as urobilin and is produced in the liver from the breakdown of red blood cells. It is then excreted by the kidneys in urine, giving urine its characteristic yellow color.

5. **Final Answer**: The yellow color of urine is due to the presence of **urochrome**.

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