In a Left AIC, how does the left posterior ilium rotate on the sacrum, and how does the right posterior ilium rotate on the sacrum?

• A. In a Left AIC, the left posterior ilium internally rotates on the sacrum, while the right posterior ilium externally rotates on the sacrum.
• B. Left posterior ilium internally rotates; Right posterior ilium externally rotates.
• C. Left posterior ilium externally rotates; Right posterior ilium internally rotates.
• D. Both posterior ilia rotate externally.

Answer: (A)