This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
True about osteoarthritis 
Select and explain. 
A. Increased hydration of articular cartilage, B. Decreased proteolytic enzmyes of articular cartilage, C. Increased ESR, D. Decreased viscosity of synovial fluid
A: Increased hydration of articular cartilage
Answer: A: Increased hydration of articular cartilage 
Explanation: None