This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Gynaecology & Obstetrics
[{'content': 'All are true regarding medical treatment of endometriosis except? \nSelect and explain. \nA. Oral progestins cause decidualization of endometrial tissue, B. Injectable progestagen is used once in 3 months in the management of pain of endometriosis, C. Levonorgestrel releasing intrauterine system reduces dysmenorrhoea in endometriosis, D. Gestrinone is given orally 2.5 - 5 mg per day to induce endometrial atrophy', 'role': 'user'}, {'content': "Answer: D \nExplanation: Gestrinone has a long half life. It is a 19-noestosterone derivative. It is given orally 2.5 to 5 mg twice weekly for 6 to 9 months. It has androgenic, antiprogestagenic, antioestrogenic and antigonadotrophic action. Ref : Shaw's Textbook of Gynaecology", 'role': 'assistant'}]