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
Daily dose of Fe for adult man 
Select and explain. 
A. 34 mg/d, B. 24 mg/d, C. 18 mg/d, D. 40 mg/d
C: 18 mg/d
Answer: C: 18 mg/d 
Explanation: None