A block of wood floats in water with two third of its volume submerged. In oil, the block floats with 0.90 of its volume submerged. The densities of (a) wood and (b) oil are [Density of water is 103kg/m³]

A. 700kg/m³, 600kg/m³
B. 667kg/m³, 740kg/m³
C. 600kg/m³, 500kg/m³
D. 500kg/m³, 400kg/m³