This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Social & Preventive Medicine
Break bone fever 
Select and explain. 
A. Typhoid fever, B. Dengue fever, C. Malignant fever, D. Malaria
B: Dengue fever
Answer: B: Dengue fever 
Explanation: (B) Dengue fever > After an incubation period of 2 to 7 days, the typical patient experiences the sudden onset of fever, headache, retroorbital pain, and back pain along with the severe myalgia that gave rise to the colloquial designation "break-bone fever." There is often a macular rash on the first day as well as adenopathy, palatal vesicles, and scleral injection.> Illness may last a week, with additional symptoms usually including anorexia, nausea or vomiting, marked cutaneous hypersensitivity, and--near the time of defervescence--a maculopapular rash beginning on the trunk and spreading to the extremities and the face.> Epistaxis and scattered petechiae are often noted in uncomplicated dengue, and preexisting gastrointestinal lesions may bleed during the acute illness.