This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Hyperviscosity is seen in all; except 
Select and explain. 
A. Cryoglobulinemia, B. Multiple myeloma, C. MGUS, D. Lymphoma
C: MGUS
Answer: C: MGUS 
Explanation: Hyperviscosity is seen in

Multiple myeloma
Lymphoplasmacytic lymphoma (Waldenstrom’s macroglobulinemia)
Cryoglobulinemia
Myeloproliferative disorders

MGUS (Monoclonal Gammopathy of uncertain significance):

Here, M Protein can be identified in the serum of 1% of healthy individual >50 years of age and 3% in older than 70 yrs. It is the most common form of monoclonal gammopathy. In MGUS, less than 3g/dL of monoclonal protein is present in serum and there is no Bence Jones proteinuria.