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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 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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