This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'Management of unruptured tuba! pregnancy includes: \nSelect and explain. \nA. Methotrexate, B. Prostaglandins, C. Hysterectomy, D. Laparoscopic salpingostomy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It is an antineoplastic drug acts as a folic acid antagonist and is very effective against proliferating trophoblast .It prevents conversion of folic acid to folinic acid.it directly impairs trophoblastic production of bete hcg with a secondary decrement of corpus luteum progesterone products.', 'role': 'assistant'}]