Question

Pick out the odd ones:
i) AIDS : Retro virus, lymphocytes, BCG, ELISA
ii) Bacterial disease : Rabies, cholera, common cold, influenza
iii) DPT vaccine : Diphtheria, tuberculosis, pertusis, tetanus
iv) Infective stage of Plasmodium in humans : Sporozoites, merozoites, trophozoites, gametocytes.
v) Mental dimension : brightness of skin, normal metabolism, no black rings around eyes, knows his capacity.

Answer 1

i) AIDS is caused by HIV which is a retro virus. It attacks the immune system by destroying the lymphocytes in the immune system. ELISA is used to detect AIDS. BCG vaccine protects the patient against tuberculosis. Hence BCG is the odd one out.

ii) Rabies, common cold and influenza are all caused by virus. Cholera is a bacterial disease caused by Vibrio cholerae. Hence, cholera is the odd one out.

iii) DPT vaccine is a combination vaccine against three diseases - Diphtheria, pertussis and tetanus. BCG vaccine is used to prevent tuberculosis. Hence, tuberculosis is the odd one out.

iv) Infection stage of Plasmodium in humans is the sporozoites where the parasite is transferred from the mosquito to humans. Hence, tho odd one out is sporozoites.

v) Brightness of skin, metabolism and black rings around eyes are all direct effect of mental health. Hence, the odd answer is knows his capacity.