Consider two hot bodies $B_1$ and $B_2$ which have temperatures $100^oC$ and $80^oC$ respectively at $t = 0$. The temperature of the surroundings is $40^oC$. The ratio of the respective rates of cooling $R_1$ and $R_2$ of these two bodies at $t = 0$ will be
- A$R_1:R_2 = 3:2$
- B$R_1:R_2 = 5:4$
- C$R_1:R_2 = 2:3$
- D$R_1:R_2 = 4:5$
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