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
Management of unruptured tuba! pregnancy includes: 
Select and explain. 
A. Methotrexate, B. Prostaglandins, C. Hysterectomy, D. Laparoscopic salpingostomy
A: Methotrexate
Answer: A: Methotrexate 
Explanation: 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.