This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
Which of teh following is the richest source of Vitamin C? 
Select and explain. 
A. Orange, B. Guava, C. Cabbage, D. Amla
D: Amla
Answer: D: Amla 
Explanation: Amla contain 600mg, cabbage contain 124mg,orange contain 30mg,guava contain 212mg per 100gm.REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 573