Regarding the superior orbital fissure, which is INCORRECT?

• A. its common tendinous ring binds the SOF content of nerves and muscles to the contents of the optic canal
• B. the origin of levator palpebrae superioris is its bony upper margin
• C. lacrimal, frontal and trochlear nerves pass through it
• D. the oculomotor, abducens and nasociliary nerves lie within the cone of the extraocular muscles