# If $\alpha$ unit represents $\mu \: g\: mm^{-3}$ and $\beta$ a unit represents $kg\: m^{-3}$ then

$\begin {array} {1 1} (A)\;\alpha = \beta & \quad (B)\;\alpha =10^{-6} \beta \\ (C)\;\alpha =10^{-9} \beta & \quad (D)\;\alpha = 10^{-18} \beta \end {array}$

## 1 Answer

Ans : (A)
$\alpha = \beta$
answered May 28, 2014