Q. HIV that causes AIDS, first starts destroying : (a) Leucocytes (b) Helper T-lymphocytes (c) Thrombocytes (d) B-lymphocytes Solution : Correct option : B AIDS is caused by Human Immunodeficiency…
Q. At which stage of HIV infection does one usually show symptoms of AIDS : (a) Within 15 days of sexual contact with an infected person. (b) When infective retro-virus…
Q. The cell-mediated immunity inside the human body is carried out by : (a) Erythrocytes (b) T- lymphocytes (c) B-lymphocytes (d) Thrombocytes Solution : Correct option : B Acquired immunity…
Q. The disease due to which maximum death in children in : (a) Diphtheria (b) Whooping cough (c) Tuberculosis (d) Measles Solution : Correct option : A Diphtheria is caused…