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. 40mg., B. Ming, C. 200 mg, D. 500 mg
A: 40mg.
Answer: A: 40mg. 
Explanation: Ans. is 'a' i.e., 40 mgo The daily requirement for vitamin C --> 40 mg.