Pelvic joints and ligaments:

• A. the sacroiliac joint is a fibrous joint between the auricular surfaces of the ilium and sacrum
• B. the wedge shape of the sacrum contributes to its stability
• C. the coccygeous muscle lies on the pelvic surface of the sacrotuberous ligament
• D. the sacrotuberous and sacrospinous ligaments enclose the greater sciatic foramen
• E. the iliolumbar ligament is V-shaped with the apex attached to L5