This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other disorders of bone, Subject name: Pediatrics
A 10-year-old boy was admitted to the ward with complaints of fever for 2 weeks duration. After admission his fever pattern is recorded (shown below). In addition, he has ahritis and hepatosplenomegaly. What is the likely diagnosis? 
Select and explain. 
A. Systemic onset JIA, B. Acute Leukemia, C. Enteric fever, D. Measles
A: Systemic onset JIA
Answer: A: Systemic onset JIA 
Explanation: The depicted fever pattern is suggestive of Quotidian fever. Quotidian fever means the presence of daily fever spikes with temperature touching and going below baseline (37oC ) on occasions. Among the given options, this fever pattern is suggestive of Systemic onset JIA. In Systemic onset JIA, in addition to ahritis, Systemic features such as fever, evanescent rash, enlarged liver and spleen, lymphadenopathy, serositis and pericardial effusions can be seen