Given below statements which are correct .

a) The compound is optically active.
b) In Bromobenzene, the inductive effect of bromo group is more dominant than the mesomeric effect in directing the incoming electrophile. 
c) The halogen which is most reactive in the halogens of alkane under sunlight is Cl < Br < I.
d) Vinyl halides do not undergo nucleophilic substitution only.