Q.

The correct order of the rate of the reaction for the following reaction with respect to nucleophiles is:     [2026]

CH3Br+NuCH3Nu+Br

1 ClO4->CH3COO-> -OH>PhO-  
2 PhO-> -OH>CH3COO->ClO4-  
3 CH3COO->PhO->-OH>ClO4-  
4 -OH>PhO->CH3COO->ClO4-  

Ans.

(4)