This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Plasma Cell Disorders and Multiple myeloma, Subject name: Pathology
Bence Jones proteins are derived from? 
Select and explain. 
A. Alpha globulins, B. Light chain globulins, C. Beta globulins, D. Delta globulins
B: Light chain globulins
Answer: B: Light chain globulins 
Explanation: Excretion of light chains in the urine has been referred to as Bence Jones proteinuria. Light chains includes K and l (kappa and lambda) These play a role in the pathogenesis of renal dysfunction in multiple myeloma.