BiologyConsider the following statements and choose the incorrect one:

Consider the following statements and choose the incorrect one:

  1. A

    One complete contraction and relaxation of heart is called a heartbeat.

  2. B

    The average heartbeat of an adult person while resting is 70 to 80 times per minute.

  3. C

    The number of heart beats increased too much during and after a physical exercise or when a person is excited.

  4. D

    A doctor listens to our heart beats with the help of an instrument called periscope.

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