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What is Expansile lytic lesion with fluid-fluid levels within the metaphysis of fibula seen on CT and MRI in an early adolescent female is typical of – and explain in detail?
Amongst given options, fluid-fluid levels are seen in GCT and ABC.
Lesion in question is metaphyseal:-

              ABC →  Metaphyseal
             GCT →  Epiphyseal

Age of the patient is early adolescent:-

             ABC →  Before the age of 20 years
            GCT →  20 - 40 years

So, the answer to the question is ABC.