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: Unknown
An adult male presented 4 weeks after intercourse with fever, rubbery ulcer, inguinal lymphadenopathy. Causative organism: 
Select and explain. 
A. LGV, B. Syphillis, C. Chancroid, D. HIV
A: LGV
Answer: A: LGV 
Explanation: Ans. (a) LGVRef: Neena Khanna Synopsis of Dermatology 4th ed./322*LGV is an STD, caused by chlamydia presents classically with painless lymphadenopathy.*Mnemonic to remember LGV:# ABCDEFG: Asymptomatic, Bubo, Chlamydia, Doxy, Esthiomine, Fries test, Groove signDiseaseUlcerLymph nodeSyphilisPainlessPainlessChancroidPainfulPainfulLGVPainlessPainful (Bubo)