This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, 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: - the energy requirements of women are increased during pregnancy and lactation. - additional +600 kcal daily is needed during first six months of lactation. Reference: Park's textbook of preventive and social medicine, 25th edition, pg no:693