MS-3499

A 75-year-old man with a history of type 2 diabetes mellitus comes to the Emergency Department complaining of diplopia and ophthalmoplegia. Upon physical examination, it is found that his pupils are equal and reactive to light with an intact accommodation reflex. However, his right eye is abducted and looking downwards, while the rest of the examination is normal.

Which cranial nerve is impacted in this case?