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
[{'content': 'The daily extra calorie requirement in first trimester of pregnancy is - \nSelect and explain. \nA. 50, B. 150, C. 350, D. 450', 'role': 'user'}, {'content': "Answer: C \nExplanation: For pregnant woman the extra energy requirement is 350kcal.REF.PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-588 table no.29.", 'role': 'assistant'}]