Consider two hot bodies \[{{B}_{1}}\] and \[{{B}_{2}}\] which have temperatures \[{{100}^{o}}C\] and \[{{80}^{o}}C\] respectively at \[t=0\]. The temperature of the surroundings is \[{{40}^{o}}C\]. The ratio of the respective rates of cooling \[{{R}_{1}}\] and \[{{R}_{2}}\] of these two bodies at \[t=0\] will be [MP PET 1990]

• A.            \[{{R}_{1}}:{{R}_{2}}=3:2\]     
• B.            \[{{R}_{1}}:{{R}_{2}}=5:4\]
• C.            \[{{R}_{1}}:{{R}_{2}}=2:3\]     
• D.            \[{{R}_{1}}:{{R}_{2}}=4:5\]