This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: D.O.C, Subject name: Pharmacology
[{'content': 'Drug of choice for Treponema Pallidum is? \nSelect and explain. \nA. Penicillin G, B. Tetracycline, C. Azithromycin, D. Doxycycline', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) Penicillin GREF: Microbiology, Volume 2; Volume 9, Part 2 edited by E. Edward Bittar, Neville Bittar p; 241See APPENDIX-65 for "SEXUALLY TRANSMITTED DISEASES""Parenteral penicillin G remains the treatment of choice for syphilis (Treponema pallidu and resistance to penicillin has not been reported"', 'role': 'assistant'}]