Sex worker with discharging ulcer, gram-negative diplococci & growth on modified
Thayer Martin media. Diagnosis: (A) N. gonococci, (B) Syphilis, (C) LGV, (D) Chancroid
Answer is A. 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.