SI unit of density is _________ times its CGS unit.

The correct option is A 0.001

SI unit of density is $kg/m^3$

CGS unit of density is $g/c{m}^3$.

We know that $1kg=1000g$ and $1=m=100cm$

Thus $1\frac{kg}{m^3}=\frac{1kg}{m^3}\times \frac{1000g}{kg}\times \frac{1m^3}{(100{)}^{3}c{m}^3}=0.001g/c{m}^3$