Which of the following symptoms is typical for acute ulcerative colitis?

In the context of acute ulcerative colitis, touch friability of the mucosa is a hallmark symptom. This phenomenon occurs due to the inflamed and ulcerated nature of the colonic mucosa in this condition. The inflamed tissue becomes soft and highly sensitive, leading to the mucosa being fragile and easily damaged upon palpation or examination, which is what is meant by friability. During a colonoscopy, for instance, ulceration and bleeding may be observed, indicating the severe inflammation associated with the disease.

This symptom is significant as it reflects the underlying pathology of ulcerative colitis, where there is continuous inflammation of the colon leading to sores (ulcers) that can bleed and produce mucosal damage. Recognizing this symptom is crucial for diagnosis and understanding the severity of the disease, which can guide treatment options.

The other symptoms listed, while potentially relevant to different conditions or situations, do not directly correlate with the typical presentation of acute ulcerative colitis. Hence, the presence of touch friability of the mucosa distinctly aligns with the characteristics of the disease.