This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Natural Methods, Barrier Methods, IUDs, OCPs, Subject name: Social & Preventive Medicine
[{'content': 'During the first 6 months of lactation, which amongst the following contraceptives is not advisable? \nSelect and explain. \nA. DMPA, B. Combined oral contraceptives pills, C. Progestin only pills, D. Norplant', 'role': 'user'}, {'content': 'Answer: B \nExplanation: - Combined oral contraceptives are relatively contraindicated in the first six months of delivery, as they decrease breastmilk output. - Progestin-only methods can be used after 6 weeks of delivery safely as they have little to no effect on lactation post-six weeks.', 'role': 'assistant'}]