True about Wilson's disease is:

C. Increased urinary copper excretion(Ref: Nelson's 20/e p 1939-1940)In Wilson disease serum ceruloplasmin is decreased (<20mg/dL), "free" copper level may be elevated in early ds (>1.6mmol/L)Urinary copper excretion is increased to >100-1000mg/day & hepatic copper content is >250mg/g dry weight in Wilson disease