Meena rubbed the yellow coloured turmeric stain on his son's shirt with soap. She observed the colour of the stain became:

Options

A. pink
B. reddish brown
C. remained yellow
D. white

Explanation

To solve the question regarding the turmeric stain on Meena's son's shirt, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Stain**: The stain on the shirt is caused by turmeric, which is known for its yellow color.

2. **Understand the Nature of Turmeric**: Turmeric acts as a natural pH indicator. It changes color depending on the acidity or basicity of the solution it comes into contact with.

3. **Determine the pH of Soap**: Soap is typically basic in nature. When Meena rubbed the turmeric stain with soap, the basicity of the soap would interact with the turmeric.

4. **Color Change Reaction**: When turmeric is in a basic solution, it changes color from yellow to reddish-brown. This is a characteristic reaction of turmeric when it comes into contact with a basic substance.

5. **Conclusion**: After rubbing the turmeric stain with soap, Meena would observe that the color of the stain changed from yellow to reddish-brown.

### Final Answer:
Meena observed the color of the turmeric stain became reddish-brown.

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