Compound P and R upon ozonolysis produces Q and S respectively. The molecular formula of Q and S is $C_8{H}_{8}O$. Q undergoes Cannizzaro reaction but not haloform reaction, whereas S undergoes haloform reaction but not Cannizzaro reaction 

i) $P\underset{ii)Zn/H_{2}O}{\overset{i)O_3,C{H}_{2}C{l}_2}{\to }}\underset{\left(C_8{H}_{8}O\right)}{Q}$           ii)  $R\underset{ii)Zn/H_{2}O}{\overset{i)O_3,C{H}_{2}C{l}_2}{\to }}\underset{\left(C_8{H}_{8}O\right)}{S}$

The option(s) with suitable combination of P and R respectively is (are)