Q. In which of the following pairs of carbocations, the first carbocation is more stable than the second?
(i) CH2=CH−+CH2 and CH2=CH−CH2−+CH2
(ii) CH3−NH−+CH2 and +CH2−OH
(iii) CH3−O−CH2−+CH2 and CH2−O−+CH2
(iv) CH3−+CH−CH2CH2CH3 and CH3CH2−+CH−CH2CH3