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
Methotrexate should be given with which of the following to decrease its side effects ? 
Select and explain. 
A. Folic acid, B. Cyanocobalamin, C. Thiamine, D. Folinic acid
D: Folinic acid
Answer: D: Folinic acid 
Explanation: None