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': 'Dysmenorrhoea is due to ? \nSelect and explain. \nA. Ovulation, B. Decreased progesterone, C. Increasedprogesterone, D. Secretoryepithelium', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is'b'i.e., Decreased progesteroneDysmenorrhoea refers to painful cramping pain accompanying menstruation.Dysmenorrhoea in ovulatory cycle is due to release of PGs, in endometrium induced by progesteroneDysmenorrhoea is classified into :Primary dysmenorrhoea refers to one that is not associated with any identifiable pelvic pathology. It is now clear that the pathogenesis of pain is attributable to a biochemical derangement.Secondary dysmenorrhoea refers to the one associated with the presence of organic pelvic pathology, i.e. fibroids, adenomyosis, PID endometriosis. Unilateral dysmenorrhoea occurs in a rudimentary horn of a bicornuate uterus", 'role': 'assistant'}]