Sleeping sickness is due to the bite of
The correct option is B Tsetse fly
Sleeping sickness is a vector-borne parasitic disease. It is caused by infection with protozoan parasites belonging to the genus Trypanosoma. They are transmitted to humans by tsetse fly (Glossina genus) bites, which have acquired their infection from human beings or from animals harbouring the human pathogenic parasites. So, the correct answer is option B.