This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infections of the genital tract, Subject name: Gynaecology & Obstetrics
A lady presented with creamy white or slightly green vaginal discharge, drug of choice is : 
Select and explain. 
A. Doxycycline, B. Ofloxacin, C. Metronidazole, D. Clindamycin
C: Metronidazole
Answer: C: Metronidazole 
Explanation: Symptoms are suggestive of trichomoniasis : Metronidazole 200mg by mouth 3 times a day for 7 days prescribed for both paners,and adviced to abstain from intercourse or use condomduring therapy. It is best taken after meals othervise nausea and vomiting can occur. SHAW'S TEXTBOOK OF GYNECOLOGY,Pg no:146,15th edition