$$\(27 Q, R\)$$ and $$\(S\)$$ are fossil fuels. The main constituent of $$\(Q\)$$ is methane. $$\(R\)$$ is a source of diesel oil and bitumen. $$\(S\)$$ is burned in car engines. Which row identifies $$\(Q, R\)$$ and $$\(S\)$$ ?

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