This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
[{'content': 'Which of the following is responsible for ligament laxity during pregnancy? \nSelect and explain. \nA. Estrogen, B. Prolactin, C. Progestrone, D. B hcg', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans c (progestrone) Ref: Sheila Balakrishnan pg 91Progestrone induced relaxation of joints contributes to the changes in posture in pregnancy- Progressive lordosis and waddling gait.', 'role': 'assistant'}]