The correct option is D Carbocation and anion
Due to the difference in the electronegativities of C and Br heterolytic fission will result into the formation of a positively and a negatively charges ion. Br being more electronegative shifts the bond pair of electrons towards itself and on breaking of bond it takes away the bond pair of electrons and acquires a negative charge. Thus, forming an anion. Whereas, C being less electronegative than Br loses the pair of electron and acquires a positive charge, thus, forming a carbocation.