This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inflammatory Bowel Disease, Subject name: Medicine
Which of the following is a feature of Ulcerative colitis? 
Select and explain. 
A. Spiking fever, B. Proctitis, C. Fistula formation, D. Cobble stone mucosa
B: Proctitis
Answer: B: Proctitis 
Explanation: a. Spiking fever - positive in Crohn's disease because of intraabdominal abscess. b. Proctitis - Rectum inflammation is a feature of Ulcerative colitis. c. Fistula formation - Positive in Crohn's disease d. Cobble stone mucosa - Positive in Crohn's disease