A client with chronic adrenal insufficiency should be assigned a room away from which of the following roommates?

The correct choice is for the client with pneumonia due to the heightened vulnerability of individuals with chronic adrenal insufficiency, also known as Addison's disease. People with this condition have inadequate levels of adrenal hormones, particularly cortisol, which plays a crucial role in immune response and stress management. As a result, they are more susceptible to infections and may experience a more severe course of illness if exposed to pathogens.

A young adult client with pneumonia is likely to harbor infectious agents that could pose a significant risk to the individual with adrenal insufficiency, who may not have the immune resilience to combat these infections effectively. Therefore, it is essential to minimize exposure to infectious conditions in these vulnerable patients.

In contrast, the other options involve clients with non-infectious conditions (fractured leg, previous brain attack, cholecystitis) that do not present the same level of infection risk. While any hospital setting requires precautions, the specific infectious risk associated with pneumonia makes it vital for the client with chronic adrenal insufficiency to be placed away from this roommate to protect their health.