Two bodies having volumes V and 2V are suspended from the two arms of a common balance and they are found to balance each other. If larger body is immersed in oil (density `d_(1)=0.9gm//cm^(3)`) and the smaller body is immersed in an unknown liquid, then the balance remain in equilibrium. The density of unknown liquid is given by :

Options

A. `2.4" gm"//"cm^(3)`
B. `1.8" gm"//"cm^(3)`
C. `0.45" gm"//"cm^(3)`
D. `2.7" gm "//"cm"^(3)`