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
Medical treatment of ectopic gestation involves use of all the following drugs except : 
Select and explain. 
A. Prostaglandins, B. Methotrexate, C. RU-486, D. Dexamethasone
D: Dexamethasone
Answer: D: Dexamethasone 
Explanation: Dexamethasone