Which is an indicator of severe Ulcerative colitis?

(A) Blood in lumen on sigmoidoscopy # Severe Ulcerative collitis: Bowel movements >6 per day, Severe Blood in stool, Severe Fever 37.5C mean.Tachycardia >90 mean pulse, Anemia <75%, Sedimentation rate >30 mm, Endoscopic appearance Spontaneous bleeding, ulcerations.> Sigmoidoscopy is used to assess disease activity and is usually performed before treatment. If the patient is not having an acute flare, colonoscopy is used to assess disease extent and activity.> Endoscopically mild disease is characterized by erythema, decreased vascular pattern, and mild friability.> Moderate disease is characterized by marked erythema, absent vascular pattern, friability and erosions, and severe disease by spontaneous bleeding and ulcerations.