This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Which of the following is known as 'protective foods'? 
Select and explain. 
A. Vegetables, B. Milk, C. Soybean, D. Pulses
A: Vegetables
Answer: A: Vegetables 
Explanation: Vegetables are classified as 'protective foods'; their value resides in their high vitamin and mineral content. Vegetables usually have a large water content, low energy and protein content and varying amounts of 'dietary fiber'. Ref: Park's textbook of Preventive and Social Medicine, 19th edition, Page 498.