Final answer:
To identify the internal auditory canal on a diagram, look for an opening on the medial wall of the petrous part of the temporal bone in the posterior cranial fossa, where the facial and vestibulocochlear nerves pass through.(option a)
Step-by-step explanation:
The question 'Which arrow points to the internal auditory canal (IAC)?' is referring to a diagram that the student would provide, usually found in an anatomy textbook. The internal auditory canal is an important passage within the temporal bone of the skull. It allows for the transmission of the facial nerve, the vestibulocochlear nerve, and the labyrinthine artery. To answer this question accurately, I would need to see the specific figure to identify which arrow points to the IAC. However, generally speaking, the IAC is located on the medial wall of the petrous part of the temporal bone in the posterior cranial fossa.
Given the importance of the internal auditory canal in the essential functions of hearing and balance, I would instruct the student to look for an opening in that region of a diagram of the skull or the temporal bone.
Hence,the answer is option a