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: Gynaecology & Obstetrics
[{'content': 'Initiation of lactation is affected by:a) Oxytocinb) Prolactinc) HPLd) Thyroid hormonee) Progesterone \nSelect and explain. \nA. abce, B. abcd, C. acde, D. abde', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]