Noncommunicable diseases are best described as noninfectious and not transmissible.

• A. Infectious and transmissible
• B. Infectious and not transmissible
• C. Noninfectious but transmissible
• D. Noninfectious and cannot be transmitted

Answer: (D)

Noncommunicable diseases are not caused by infectious agents and do not spread from person to person. They arise from a mix of genetic factors, long-term lifestyle, and environmental exposures, and they typically persist rather than resolving through someone else catching the illness. Examples include heart disease, diabetes, chronic respiratory diseases, and many cancers. Because they are not caused by pathogens and are not contagious, describing them as noninfectious and not transmissible best fits their nature. Describing them as infectious would imply they can spread between people, which is not the case, and saying they are noninfectious but transmissible would be contradictory to how these diseases operate.