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': 'A patient was placed on depot medroxy progesterone acetate. She now complains of irregular spotting. All of the following can be a treatment option except \nSelect and explain. \nA. Add combined OCPs for 4 weeks., B. Give Mefenamic acid for 1 weeks., C. Give premarin for 4 weeks., D. Place progestin -  only implant.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: DMPA or Progestin implants both being progesterone preparations cause AUB.', 'role': 'assistant'}]