This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'Relaxin during pregnancy is secreted by : \nSelect and explain. \nA. Corpus luteum, B. Decidua, C. Both of the above, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: It is a peptide hormone structurally related to insulin. The main source of production is the corpus luteum of the ovary but pa of it may be also produced by the placenta and decidua. It has been claimed that relaxin relaxes myometrium, the symphysis and sacroiliac joints during pregnancy and also helps in cervical ripening by its biochemical effect. Reference:textbook of obstetric,Dutta,7nd edition,page no:68', 'role': 'assistant'}]