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
Among the following which has the highest quantity of retinol per 100 g of fruit ? 
Select and explain. 
A. Papaya, B. Orange, C. Ripe mango, D. Tomato
C: Ripe mango
Answer: C: Ripe mango 
Explanation: None