Which of the following food items is the best source of plant proteins?

(a) Milk

(b) Egg

(c) Legumes

(d) Cheese

(c) Legumes

Legumes are the best source of plant proteins among the given options. The category of legumes includes foods like beans, lentils, chickpeas, and peas, all of which are excellent plant-based sources of protein.

The other options are incorrect because they are all animal products:

• Milk and Cheese are dairy products from animals.
• Egg comes from an animal.

While they are all rich in protein, they are sources of animal protein, not plant protein.