In which of the following disorder, the alveoli get filled with fluid leading to severe problems in respiration?
Common cold
Whooping cough
Diphtheria
Pneumonia
Which one of the following pairs of disease can spread through blood transfusion
Cause of ’cysticercosis' is
Which of the following toxic substances is responsible for the high malarial fever?
Give scientific reasons : Hepatitis $B$ and Bird flu $DNA$ vaccines are called Recombinant $DNA$ vaccines.
Cancer is caused by