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: Pathology
[{'content': 'Positive nitrogen balance is seen in: \nSelect and explain. \nA. Pregnancy, B. Kwashiorkar, C. Fever, D. Marasmus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pregnancy is a state of anabolism and it shows positive nitrogen balance.', 'role': 'assistant'}]