Most stable rearranged form of given carbocations is:

Whenever an intermediate carbocation is formed in reaction it may rearranges. Only those carbocation will rearrange which can produce more stable species . It can be done either by : (i) Shifting of H, alkyl , aryl, bond (1,2-shifting ) (ii) Ring expansion (iii) Ring contraction Most stable rearranged carbocation is is

Most stable carbocation is:

Most stable carbocation is:

Most stable carbocation is:

Most stable carbocation is