Which of the following best describes the symptom set commonly associated with mononucleosis?

• A. Fever only
• B. Sore throat and fatigue only
• C. Fever, sore throat, extreme fatigue, swollen lymph nodes, enlarged spleen or liver
• D. Headache and rash

Answer: (C)

Mononucleosis typically presents with a broader systemic set of symptoms rather than a single complaint. The hallmark pattern includes fever and sore throat from pharyngitis, pronounced fatigue that can be prolonged, swollen lymph nodes (often in the neck), and enlargement of the spleen or liver from the immune response to EBV infection. This combination reflects the way the illness affects both the lymphoid tissues and the viscera, producing a characteristic cluster that helps distinguish it from milder or unrelated conditions that might cause only fever, only sore throat, or only headache and rash. The other options miss key parts of the classic picture—for example, fever alone is nonspecific, sore throat with fatigue lacks lymphadenopathy and organ enlargement, and headache with rash does not fit the typical mono presentation.