Which statement is true about non-communicable diseases?

• A. They are always contagious.
• B. They are not passed from person to person.
• C. They are caused only by viruses.
• D. They are not transmitted from person to person.

Answer: (D)

Non-communicable diseases are not transmitted from person to person. They develop from a mix of genetic factors, age, lifestyle choices, and environmental influences, rather than from infectious agents that spread between people. This means they aren’t contagious through usual routes like touch, air, or shared objects. Examples include heart disease, type 2 diabetes, cancers, and chronic respiratory diseases. The statement that NCDs are not transmitted captures their defining feature, unlike infectious diseases which can spread between individuals. Saying they are always contagious is incorrect, and claiming they are caused only by viruses is also incorrect, since NCDs arise from non-infectious factors.