This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Contraceptives, Subject name: Gynaecology & Obstetrics
[{'content': 'Progesterone release rate in progestase is:- \nSelect and explain. \nA. 25 ug/day, B. 40ug/day, C. 65ug/day, D. 80ug/day', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Progestase: T-shaped device carrying 38 mg of progesterone in silicon oil reservoir in the veical stem. Releases 65 mcg of the hormone per day. Hormone released in the uterus forms a thick plug of mucus at the cervical os which prevents penetration by the sperms and thus exes an added contraceptive effect. Menstrual problems like menorrhagia and dysmenorrhoea noticed with Copper T are less with this device (40% reduction) Expensive and requires yearly replacement.', 'role': 'assistant'}]