Final answer:
A client with pulmonary tuberculosis should be placed on droplet precautions.
Step-by-step explanation:
Based on the given information, the client who should be placed on droplet precautions is a client with pulmonary tuberculosis (TB). Tuberculosis is a respiratory disease caused by the bacterium Mycobacterium tuberculosis. It is primarily spread through respiratory droplets when an infected person coughs or sneezes. To prevent the transmission of TB, it is important to isolate the infected client and take precautions such as wearing masks and maintaining proper hygiene.