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
Extra calories in lactating mothers in first six months – 
Select and explain. 
A. 300, B. 500, C. 600, D. 1000
C: 600
Answer: C: 600 
Explanation: Extra energy requirement during lactation → +600 (during 1st  6 months) and +520 (during 6-12 months).