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In the mammalian brain, the cerebral cortex is a neural tissue lining the cerebrum. It is covered by meninges that are also called gray matter. The function of gray matter is to manage thoughts, consciousness, language, emotion, and memory.

Short-term memory is the function of the pre-frontal cortex of the cerebral cortex. The information then stops at the hippocampus region of the brain. A brain aneurysm may cause short-term memory loss.

Thus, the cerebral cortex plays a role in short-term memory.

Therefore, the given option is incorrect.

The brain parts, cerebral cortex, frontal lobe, medial and temporal lobe, all play essential roles in long-term memory. It is maintained by the permanent changes in the neural connections throughout the brain.

Thus, the cerebral cortex plays a role in long-term memory.

Therefore, the given option is incorrect.

The hypothalamus of the brain plays a role in circadian rhythms. The hypothalamus's suprachiasmatic nucleus (SCN), which comprises about 2000 neurons, manages the circadian rhythms.

Thus, the circadian rhythms are not controlled by the cerebral cortex.

Therefore, the given option is correct.

The brain stem, near to the cerebral cortex, plays a role in holding breath. It connects the brain to the spinal cord and performs functions like digestion, heart rate, breathing, and blood pressure.

Thus, the cerebral cortex plays a role in holding breath.

Therefore, the given option is incorrect.