What is osteoarthritis primarily caused by?

• A. Autoimmune Reaction
• B. Infection
• C. Wear and Tear
• D. Genetic Condition

Answer: (C)

Osteoarthritis is primarily caused by wear and tear on the joints over time. This degenerative joint disease results from the gradual breakdown of cartilage, which is the cushioning material between bones. Factors such as aging, repetitive use of joints, joint injuries, and obesity contribute to this deterioration. As the cartilage erodes, bones may begin to rub against each other, leading to pain, swelling, and reduced mobility. Unlike conditions resulting from autoimmune reactions, infections, or genetic predispositions, osteoarthritis specifically relates to the physical stresses placed on the joints, making "wear and tear" the most accurate description of its primary cause.