A patient presents with ptosis, pupillary dilation, and an eye that is "down and out." Which cranial nerve is most likely affected?

✓ Correct Answer: Option C

Damage to the oculomotor nerve (CN III) impairs innervation to most extraocular muscles, causing the eye to be "down and out," and also affects parasympathetic fibers to the pupil, causing dilation and ptosis.