Correct Answer:
B. Diabetes
The correct answer is Diabetes. Diabetes mellitus is a metabolic disorder characterized by high blood sugar levels over a prolonged period. It occurs when the body either does not produce enough insulin (Type 1) or does not respond properly to insulin (Type 2), affecting carbohydrate metabolism. Among the options:
- Malaria: An infectious disease caused by parasites, not metabolic.
- Diabetes: Correct; it is a metabolic disease.
- Tuberculosis: A bacterial infectious disease of the lungs.
- Influenza: A viral respiratory infection.
Therefore, the correct answer is "Diabetes".