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
Gingival biopsy is useful in the diagnosis of- 
Select and explain. 
A. Sarcoidosis, B. Amyloidosis, C. Histoplasmosis, D. Scurvy
B: Amyloidosis
Answer: B: Amyloidosis 
Explanation: Harshmohan textbook of pathology 7th edition. In systemic amyloidosis renal biopsy provides the best detection rate but rectal biopsy also has a good pickup rate. However gingiva and skin biopsy have poor result. .