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In a room where the temperature is 30^(@...

In a room where the temperature is `30^(@)C`, a body cools from `61^(@)C` to `59^(@)C` in 4 minutes. The time (in min.) taken by the body to cool from `51^(@)C` to `49^(@)C` will be

A

`4` min

B

`6` min

C

`5` min

D

`8` min

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