Normal pulse rate of the body is.. 70 - 80 - mm

Normal pulse rate of the body is:
a\ ( 70 – 80 )\ mm.
b\ ( 90 – 100 )\ mm.
c\ ( 170 – 180 )\ mm.
d\ ( 50 – 60 )\ mm.
e\ ( 150 – 160 )\ mm.
the answer is A