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Dear Student,
The rate of heartbeat is controlled by vagus nerve (tenth cranial nerve) which is a parasympathetic nerve fiber. Hence, the correct answer is option (A).
For the functions of other cranial nerves, kindly refer to the following link,
https://www.meritnation.com/ask-answer/question/write-two-functions-of-cranial-nerve/science/10579385
Regards
The rate of heartbeat is controlled by vagus nerve (tenth cranial nerve) which is a parasympathetic nerve fiber. Hence, the correct answer is option (A).
For the functions of other cranial nerves, kindly refer to the following link,
https://www.meritnation.com/ask-answer/question/write-two-functions-of-cranial-nerve/science/10579385
Regards