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A system S receives heat continuously fr...

A system `S` receives heat continuously from an electric heater of power `10 W`. The temperature of `S` becomes constant at `50^(@)C` when the surrounding temperature is `20^(@)C`. After the heater is switched off, `S` cools from `35.1^(@)C` to `34.9^(@)C` in `1 minute`. the heat capacity of `S` is

A

`100J//^(@)C`

B

`300J//^(@)C`

C

`750J//^(@)C`

D

`1500J//^(@)C`

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