This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
Which of the following biochemical test is ideal for identification of Neisseria gonorrhea? 
Select and explain. 
A. Sucrose fermentation test, B. Oxidase test, C. Penicillin resistant test, D. Coagulase test
B: Oxidase test
Answer: B: Oxidase test 
Explanation: The Neisseria produce oxidase and give positive oxidase reactions. The oxidase test is a key test for identifying them. When bacteria are spotted on a filter paper soaked with tetramethyl paraphenylenediamine hydrochloride (oxidase), the neisseriae rapidly turn dark purple.Reference: Jawetz, Melnick, & Adelberg's Medical Microbiology; 27th edition; Chapter 20; The Neisseriae