Droplet method of transmission of disease is found in
common cold
The correct option is A
Explanation of correct option
The common cold is a viral infection usually caused by rhinovirus and it can be easily transmitted through airborne droplets that are sneezed into the air by an infected person.
Explanation of incorrect options:
Option B:
AIDS is caused by the Human immunodeficiency virus which is commonly spread through sexual contact with an infected person and can also be transmitted by sharing needles used by an infected person during the injection.
Option C:
Hepatitis is spread by transfusion of contaminated blood, using contaminated needles used by an infected person.
Option D:
Syphilis is a bacterial infection that is transmitted through sexual contact.
Final answer: The droplet method of transmission of the disease is found in the common cold.