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: Surgery
Sulfonamide useful in treating ulcerative colitis is - 
Select and explain. 
A. Sulfadiazine, B. Sulfasalazine, C. Sulfamethoxazole, D. Sulfadimidine
B: Sulfasalazine
Answer: B: Sulfasalazine 
Explanation: None