This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Which is a finding in lymphoid tissues in individuals with common variable hypogammaglobulinemia? 
Select and explain. 
A. Decreased B cell count, B. Increased B cell count, C. Normal B cell count, D. Absent B cells
C: Normal B cell count
Answer: C: Normal B cell count 
Explanation: Common Variable Immunodeficiency Near Normal number of B cells in blood & LN Unable to differentiate to plasma cells Intrinsic B cell defects - defective CK receptor BAFF Also abnormal T cell regulation of B cells Both sexes equally; manifest in childhood or adolescence Presents as Recurrent sinopulmonary pyogenic infections Recurrent herpes V infection Persistent diarrhoea by G Lamblia RA Lymphoid malignancy