Final answer:
The primary auditory cortex consists of three main divisions: the core, belt, and parabelt. Among the provided choices, 'hyperbelt' is not a division of the auditory cortex.
Step-by-step explanation:
The primary auditory cortex is crucial for processing auditory information, and it consists of three main divisions: the core, belt, and parabelt regions.
Each of these areas plays a role in analyzing sounds and is involved in complex auditory perception. Among the options provided (a) belt, (b) parabelt, (c) core, and (d) hyperbelt, (d) hyperbelt is not a division of the auditory cortex, making it the correct answer to the question.