Which of the following statement is /are correct about the human body?
a)The longest bone is the femur.
b)The smallest bone is the stapes.
c)The life span of RBC is 180 days.
d)The blood pressure is measured by a stethoscope.
1
(a) only
2
(a) and (b) only
3
(b) and (c) only
4
(d) only