This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Methods - Progestogen-Only Contraception, Subject name: Gynaecology & Obstetrics
[{'content': 'MIRENA life is: \nSelect and explain. \nA. 3 years, B. 1 year, C. 5 years, D. 10 years', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref: Dutta Textbook of Obstetrics pg 538,539.543Explanation:MIRENAMIRENA is levonorgestrel releasing Intra uterine deviceCauses uniform and strong suppression of endometriumTotal LNG 52mg released at 20mcg per dayReplaced every 5 yrsMechanism of ActionThinning of endometrial liningInhibition of sperm movementThickening of cervical mucusNon contraceptive benefitsReduction in menorrhagiaDvsmenorrhoeaPremenstrual syndrome.Used in treatment ofEndometrial hyperplasia.Adenomyosis,Uterine leiomyomaEndometrial caHormone replacement therapy', 'role': 'assistant'}]