This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Demography and family planning, Subject name: Social & Preventive Medicine
[{'content': 'With the use of DMPA contraceptive, the side effects are all of the following except \nSelect and explain. \nA. Change in quantity and quality of breast milk, B. Weight gain, C. Irregular bleeding, D. Amenorrhea', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The advantage of DMPA is that it does not affect lactation Side effects include weight gain, irregular menstrual bleeding and prolonged infeility after its use Reference : Park&;s textbook of preventive and social medicine, 23rd edition, Page no: 503', 'role': 'assistant'}]