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 the following is the r,ichest source of Vitamin C? 
Select and explain. 
A. Orange, B. Guava, C. Cabbage, D. Amila
D: Amila
Answer: D: Amila 
Explanation: Orange contains 30mg ,guava-212mg,cabbage-124mg and amla contains 600mg/100g.REF.PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-573.