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
Bone marrow in AL amyloidosis shows - 
Select and explain. 
A. Bone marrow plasmacytosis, B. Granulomatous reaction, C. Fibrosis, D. Giant cell formation
A: Bone marrow plasmacytosis
Answer: A: Bone marrow plasmacytosis 
Explanation: Ans. is 'a' i.e., Bone marrow plasmacytosiso AL amyloid is due to proliferation of B cells and plasma cells (plasmacytosis).