To solve this problem, we need to match each disease with its correct type of vaccine. Let's analyze each disease:$\newline \bullet$a. Tuberculosis:$\newline$ - The vaccine for tuberculosis is the BCG vaccine, which uses a harmless strain of bacteria.$\newline$ - This matches with iv. Harmless bacteria.$\newline \bullet$b. Whooping cough:$\newline$ - The vaccine for whooping cough is the DTP vaccine, which includes a component for whooping cough made from killed bacteria.$\newline$