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: Surgery
[{'content': 'Acute mastitis commonly occurs during- \nSelect and explain. \nA. Pregnancy, B. Puberty, C. Lactation, D. Infancy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: • Involvement of the interlobular connective tissue of the breast by an infectious process.\n• The patient develops nipple fissuring and milk stasis, which initiate a retrograde bacterial infection.\n• Emptying of the breast using breast suction pumps shortens the duration of symptoms\xa0and reduces the incidence of recurrences.\n• The addition of antibiotic therapy\xa0results in a satisfactory outcome in >95% of cases.', 'role': 'assistant'}]