Modulation rate The rate at which a carrier is varied to represent the information in a digital signal, such as a pulsed electronic or optical signal. The modulation rate usually is expressed in units per second, such as pulses, significant instants, unit intervals, bits, or signal elements per second.BitrateIt describes the rate at which bits are transferred from one location to another. Bit rate gives the data rate, measured in bits per second.Baud rate The rate at which information is transferred in a communication channel. Baud rate gives the signalling rate, measured in symbols per second,Pulse rateIt is the number of heartbeats per minute. the resting pulse rate for an average adult is between 60 and 80 beats per minute.Therefore, Pulse rate is the answer.