The four compounds given below undergo coupling with diazonium salts
 

Choose the correct alternatives from the following regarding the reactivity of these compounds in the coupling with diazonium salt.

Due to the highest activating tendency of I, it is the fastest reacting species in coupling of diazonium salt- Similarly, due to same reason III is more reactive than IV. On the other hand, due to least activating tendency of IV, it is least reactive.