Stool of a person is whitish grey coloured due to malfunction of which of the following organs?

Options

A. Pancreas
B. Spleen
C. Kidney
D. Liver

Explanation

To determine which organ's malfunction causes whitish grey stool, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Stool Color**: The color of stool is primarily influenced by bile pigments. Normal stool color is usually brown due to the presence of these pigments.

2. **Identify Bile Pigments**: The two main bile pigments produced by the liver are:
- **Urobilin**: This pigment is responsible for the yellow color in urine.
- **Stercobilin**: This pigment gives stool its brown color.

3. **Recognize the Role of the Liver**: The liver is the organ responsible for producing bile, which contains these pigments. If the liver is functioning properly, it will produce bile that contributes to the normal brown color of stool.

4. **Analyze the Change in Stool Color**: If the stool changes from brown to whitish grey, it indicates a lack of bile pigments. This suggests that there is a problem with bile production or secretion.

5. **Determine the Affected Organ**: Since the liver is responsible for producing bile, a malfunction in the liver would lead to decreased production of bile pigments, resulting in whitish grey stool.

6. **Conclude the Answer**: Therefore, the organ whose malfunction causes whitish grey stool is the liver.

### Final Answer:
The correct answer is **liver** (option 4).

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