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: Microbiology
All of the following are true about Diphtheroids except: 
Select and explain. 
A. Ferments sucrose, B. Normal commensal in throat, skin, conjuctiva, C. Does not produce toxin, D. Pyrazinamidase test negative
D: Pyrazinamidase test negative
Answer: D: Pyrazinamidase test negative 
Explanation: C.hoffmannii and C.xerosis both are Pyrazinamidase positive.