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
The daily requirement of Vitamin C is – 
Select and explain. 
A. 40 mg, B. 100 mg, C. 200 mg, D. 500 mg
A: 40 mg
Answer: A: 40 mg 
Explanation: None