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
A.
B.
C.
D.
