The correct answer is option 2: a green circular dot in a square. This symbol is used on the packet of a packaged food product in India to indicate that the food is vegetarian.

Option 1, a green square in a circle, is not the correct answer.

Option 3, a green plus mark, is also not the correct answer.

Option 4, a green leaf of a plant, is not the correct answer.

It is important to note that different countries may use different symbols or labels to indicate vegetarian food products. In India, the green circular dot in a square is commonly used to help vegetarians easily identify suitable food items. This symbol is particularly useful in packaged food products where the ingredients may not be immediately apparent.

Alert - The correct answer should be option 2: a green circular dot in a square.