This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
Immunoglobulins are produced by - 
Select and explain. 
A. Macrophages, B. B-cells, C. T-cells, D. NK-cells
B: B-cells
Answer: B: B-cells 
Explanation: Immunoglobulin (Ig),is a large, Y-shaped protein produced mainly by plasma cells that is used by the immune systema Ref: Ananthanarayan & Panikers textbook of microbiology 9th edition pg:94