Which term is abbreviated as OA?

• A. Osteoporosis
• B. Arthritis
• C. Osteochondritis
• D. Osteoarthritis

Answer: (D)

OA stands for osteoarthritis. This term is the standard shorthand used in medical contexts to refer specifically to the degenerative joint disease where cartilage wears down, leading to pain and stiffness. Osteoporosis is abbreviated OP and refers to loss of bone density, not a joint problem. Arthritis is a broad category of joint inflammation, not a single condition, and isn’t typically abbreviated as OA. Osteochondritis is a different condition involving bone and cartilage damage, usually labeled as OCD or similar. So the abbreviation OA directly points to osteoarthritis.