Carbocations are the intermediates formed in many organic reactions.The most stable carbocation of the following is

(1)….Neither has EWG nor has EDG ; (2) and (4)…..Have EWG -NO2 is -I and -M group which destabilizes the Carbocation by intensifying +ve charge ;(2) is least stable because -I effect is maximum ;(3)….Has EDG-CH3 is +I and +R group which stabilizes the carbocation by dispersing the +ve charge ;