The volume of 1 mole of an ideal gas with the adiabatic exponent is changed according to the relation V = b T where b = constant. The amount of heat absorbed by the gas in the process if the temperature is increased by T will be :

1. A. ( 1- +1 )R T
2. B. R -1 T
3. C. ( 2- -1 )R T
4. D. R T -1

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