## **Core Concept**
The Food Safety and Standards (FSS) Act is a regulation in India that governs food safety and standards. Food labeling, including the marking of vegetarian and non-vegetarian foods, is an essential aspect of this regulation. The labeling requirement includes a color-coded system to indicate whether a product is vegetarian or non-vegetarian.

## **Why the Correct Answer is Right**
The FSS Act mandates that food products containing eggs are considered non-vegetarian. However, products containing only eggs are labeled differently than those containing meat or other non-vegetarian ingredients. According to the FSS guidelines, foods that contain eggs but no meat are marked with a **Green** mark, which indicates that they are vegetarian or can be considered as such under certain definitions but specifically for products that are not strictly vegetarian (like products containing eggs). However, the specific convention is that **Brown** is used for non-vegetarian foods that contain eggs.

## **Why Each Wrong Option is Incorrect**
- **Option A:** . This option is incorrect because the **Green** mark typically indicates vegetarian food.
- **Option B:** . This option is incorrect because there isn't a widely recognized **Yellow** mark specifically for non-vegetarian foods containing only eggs under the standard labeling.
- **Option D:** . This option is incorrect because the **Red** mark is generally associated with non-vegetarian foods but not specifically for products containing only eggs.

## **Clinical Pearl / High-Yield Fact**
A crucial point to remember is that under the FSS Act, labeling of food products is critical for consumer safety and awareness. Specifically, **Brown** is used for non-vegetarian foods containing eggs, **Green** for vegetarian, and **Red** for non-vegetarian.

## **Correct Answer:** .