A 16-year-old basketball player complains of pain in his knees

A 16-year-old basketball player complains of pain in his knees. A physical examination reveals, in addition to tenderness, a swollen and prominent tibial tuberosity. Radiographs of the area are unremarkable. The most likely diagnosis is:

a. Osgood-Schlatter disease
b. Popliteal cyst
c. Slipped capital femoral epiphysis
d. Legg-Calvé-Perthes disease
e. Gonococcal arthritis