This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology and Rheumatology, Subject name: Medicine
Most common heavy chain disease is - 
Select and explain. 
A. Franklin disease, B. Seligmann disease, C. Mu heavy chain disease, D. Waldenstrom cryoglobulinemia
B: Seligmann disease
Answer: B: Seligmann disease 
Explanation: Ans. is 'b' i.e., Seligmann Disease (Alpha heavy chain disease) o Most common heavy chain disease is alpha chain disease called as seligmann disease.