Q.

In Cannizzaro reaction, correct order of rate of reaction with respect to substrate

   is

1 p-Me2N<p-NMe2<p-alkyl<H<p-Cl<m-Cl<m-NO2  
2 p-MeO<p-NMe2<p-alkyl<H<m-Cl<m-NO2<p-Cl  
3 p-Me2N<p-MeO<p-alkyl<H<p-Cl<m-Cl<m-NO2  
4 p-MeO<p-NMe2<p-alkyl<H<m-NO2<m-Cl<p-Cl  

Ans.

(3)

Cannizaro reaction