JEE Mains 2020 Model Paper 2 New Pattern

A cuboid of dimension (a × b × c), having mass 'm' resistivity ρ and density 'd' is connected through ideal battery 'V' volt across the opposite faces for three different situation, produces power P1,P2 and P3 respectively. Given that P1:P2:P3 = 1 : 2 : 8 choose the correct option. (given a > b > c )