$A \rightarrow P$ is a zero order reaction. At $298 \ K$ the rate constant of the reaction is $1 \times 10^{-3} \ mol \ L^{-1} \ s^{-1}$. Initial concentration of '$A$' is $0.1 \ mol \ L^{-1}$. What is the concentration of '$A$' after $10 \ s$?
- A$0.09 \ mol \ L^{-1}$
- B$0.099 \ mol \ L^{-1}$
- C$0.087 \ mol \ L^{-1}$
- D$0.011 \ mol \ L^{-1}$
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