This question tests your knowledge of diseases and their affected organs. The question asks to identify the odd pair.

Let's analyze each option:

• Jaundice: Liver: Jaundice is a condition characterized by yellowing of the skin, mucous membranes, and whites of the eyes, caused by a problem with the liver.
• Rickets: Bones: Rickets is a disease that affects bone development in children, resulting in soft and weakened bones.
• Tuberculosis: Lungs: Tuberculosis is an infectious disease primarily affecting the lungs.
• Dengue: Fever: Dengue is a mosquito-borne viral infection that causes a flu-like illness. While it can cause a high fever, it's not primarily a disease *of* the fever itself. The fever is a symptom, not the defining characteristic of the disease.

The other three pairs represent a disease and the primary organ or system it affects. Dengue, while causing a fever, doesn't define fever as its primary target. Therefore, "Dengue: Fever" is the odd pair.