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 the richest source of Vitamin C? 
Select and explain. 
A. Orange, B. Guava, C. Cabbage, D. Amla
D: Amla
Answer: D: Amla 
Explanation: Ans. is 'd' i.e., Amla