Pruritus is defined asSelect one:a.circumscribed malformation of the skin.b.itching.c.escape of blood into the skin.d.redness.

Break Down the Problem

1. Identify the key terms in the question.
2. Analyze the definitions provided in the options.
3. Determine which option best defines "pruritus."

Relevant Concepts

• Pruritus is a medical term that relates to sensations of itching.
• The options provided describe different skin conditions or symptoms.

Analysis and Detail

1. Option a (circumscribed malformation of the skin) describes a type of lesion rather than itching.
2. Option b (itching) directly relates to the well-known definition of pruritus.
3. Option c (escape of blood into the skin) refers to a different phenomenon, such as bruising.
4. Option d (redness) is related to inflammation but does not define pruritus.

Verify and Summarize

Based on the analysis, pruritus specifically refers to an itching sensation.

Final Answer

b. itching.