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: Pharmacology
The drug of choice in choriocarcinoma is : 
Select and explain. 
A. Methotrexate, B. Actinomycin–D, C. Vincristine, D. 6–Thioguanine
A: Methotrexate
Answer: A: Methotrexate 
Explanation: None