Question

1. which disorder is an autoimmune disorder that affects the musculoskeletal system?

spondylosis
spina bifida
rheumatoid arthritis
osteoarthritis

Explanation:

Spondylosis is degenerative spinal arthritis (non-autoimmune); spina bifida is a congenital neural tube defect; osteoarthritis is degenerative joint wear (non-autoimmune). Rheumatoid arthritis is an autoimmune disorder targeting the musculoskeletal system (joints, tendons).

Answer:

Rheumatoid arthritis