This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Methods - Progestogen-Only Contraception, Subject name: Gynaecology & Obstetrics
[{'content': 'Lactating mother OCP of choice - \nSelect and explain. \nA. Progestin only pil, B. Combined OCP, C. Estrogen only pill, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e., Progestin only pill "No adverse effects on lactation & hence can be suitably prescribed in lactating women and as such it is often called Lactation pill".', 'role': 'assistant'}]