system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Ridley's scale is used in classification of which disease?
assistant
The correct answer is  Ridley's logarithmic scale is used to grade the response to treatment in case of leprosy. Ref: Park 21st edition, page 293.