At $100^{\large\circ}C$ and 1 atm , if the density of liquid water is 1.0g $cm^{-3}$ and that of water vapour is $0.0006gcm^{-3}$ , then the volume occupied by water molecules in 1 litre of stream at that temperature is :

Question

$(a)\;6cm^3\qquad(b)\;60cm^3\qquad(c)\;0.6cm^3\qquad(d)\;0.06cm^3$