A small protein attached to the outer surface of the inner membrane and which acts as a mobile carrier for transfer of electrons between complex III and IV is
Cytochrome-d
Cytochrome-c
Cytochrome-b
Cytochrome-a
A small protein attached to the outer surface of the inner membrane and which acts as a mobile carrier for transfer of electrons between complex III and IV is cytochrome-c
Hence, the correct option is b.