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
All of the following are true about 5-flurouracil except 
Select and explain. 
A. It is a purine analogue, B. 5 - flurouracil acts by inhibiting Thymidilate synthase enzyme, C. It can cause hand & foot syndrome, D. It is used along with folinic acid and oxaliplatin for colorectal cancer
A: It is a purine analogue
Answer: A: It is a purine analogue 
Explanation: 5-flurouracil is a pyrimidine analogue which is converted to dUMP in the cell and inhibits Thymidilate synthase enzyme.

Capecitabine (Prodrug of 5-flurouracil) & 5-flurouracil can cause "Hand & Foot syndrome".
FOLFOX  regimen (Folinic acid, 5-flurouracil and oxaliplatin) is the DOC for colorectal cancer.