Given below are two statements :

Statement (I) : is valid for first order reaction.

Statement (II) : is valid for first order reaction.

In the light of the above statements, choose the correct answer from the options given below :

For a reaction, $\mathrm{N}_2 \mathrm{O}_{5(\mathrm{~g})} \rightarrow 2 \mathrm{NO}_{2(\mathrm{~g})}+\frac{1}{2} \mathrm{O}_{2(\mathrm{~g})}$ in a constant volume container, no products were present initially. The final pressure of the system when $50 \%$ of reaction gets completed is

Which of the following graphs most appropriately represents a zero order reaction?

Consider the given figure and choose the correct option :