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A bucket full of hot water is kept in a room. It cools from 75oC to 70oC in T1 minutes, from 70oC to 65oC in T2 minutes and from 65oC to 60oC in T3 minutes. Which of the following relation is correct?

A T1>T2>T3
B T1C T1T3
D T1=T2=T3