I think it's most likely D because when I googled the definition it said something about gas so yeah
Answer: Ideally, the average heartbeat per minute of an individual is 80 beats per minute.
So if an individual heart's does 80 beats per minutes, then in one hour, that'd be 80 multiplied by 60 minutes, that'd be 4800 beats per hour. In a day, we have approximately 24 hours. Therefore, the total number of heart beat in a day will be 24 multiplied by 4800 which is 115200 heart beats in a day.
