Question

The average lifespan of circulating platelets is 200 h.
O An hour is a unit of volume.
An hour is a unit of temperature.
O
An hour is a unit of length.
An hour is a unit of time.
O
Answer plz_

Answer 1

$\qquad \qquad\huge \underline{\boxed{\sf Answer}}$

As we know, lifespan is something that is measured in time, and here the used unit " hour " is a unit of time.

Therefore, the correct choice is ~

$\qquad \sf  \dashrightarrow \: d$