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: Dental
Sex worker with discharging ulcer, gram-negative diplococci & growth on modified
Thayer Martin media. Diagnosis 
Select and explain. 
A. N. gonococci, B. Syphilis, C. LGV, D. Chancroid
A: N. gonococci
Answer: A: N. gonococci 
Explanation: Information in this question are -
i. Gram negative diplococci.
ii. Growth on modified Thayer-Martin media.

Neisseria gonorrhoeae is a gram negative diplococci and Thayer-Martin medium is the selective medium for gonococci.