Yellow colour of faeces is due to :

Options

A. Bile secretion
B. Green colour of bile juice
C. Degradation products of haemoglobin
D. Excessive diet of turmeric

Answer

To determine the reason for the yellow color of feces, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Feces Color**: Feces can vary in color due to several factors, including diet and the presence of certain substances in the digestive system.

2. **Identifying Possible Causes**: The question presents several options that could explain the yellow color of feces:
- A) Bile secretion
- B) Green color of bile juice
- C) Degradation of hemoglobin
- D) Excessive diet in turmeric

3. **Evaluating Each Option**:
- **Option A (Bile secretion)**: Bile is a digestive fluid produced by the liver and stored in the gallbladder. It contains bile salts, which are responsible for the digestion and absorption of fats. Bile also contributes to the color of feces. The yellow color of feces is primarily due to the presence of bilirubin, a breakdown product of hemoglobin that is processed by the liver and excreted in bile.

- **Option B (Green color of bile juice)**: While bile can appear green, it is not the direct cause of yellow feces. The yellow color comes from the breakdown of bilirubin, not the green bile itself.

- **Option C (Degradation of hemoglobin)**: Hemoglobin is red, and its degradation does not lead to yellow feces. Instead, it leads to the production of bilirubin, which is yellow. Thus, this option is not correct.

- **Option D (Excessive diet in turmeric)**: Turmeric is known for its yellow pigment (curcumin), but it does not significantly affect the overall color of feces unless consumed in excessive amounts. However, it is not the primary reason for the yellow color of feces.

4. **Conclusion**: Based on the evaluation, the yellow color of feces is primarily due to **bile secretion**, specifically the presence of bilirubin that is processed in the liver and excreted in bile. Therefore, the correct answer is **Option A: Bile secretion**.