An ideal gas in a cylinder is compressed adiabatically to one-third of its original volume. $A$ work of $45 \,J$ is done on the gas by the process. The change in internal energy of the gas and the heat flowed into the gas, respectively are
- A$45 \,J$ and zero
- B$-45 \,J$ and zero
- C$45 \,J$ and heat flows out of the gas
- D$-45 \,J$ and heat flows into the gas
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