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
All of the following are required more during lactation as compared to pregnancy, except – 
Select and explain. 
A. Iron, B. Vitamin A, C. Niacin, D. Energy
A: Iron
Answer: A: Iron 
Explanation: None