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: Surgery
The term 'pulse granuloma' suggests reaction towards
the fragments of foreign material like: 
Select and explain. 
A. Cotton fibres, B. Black silk, C. Silver amalgam, D. Legumes
D: Legumes
Answer: D: Legumes 
Explanation: None