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: Skin
24 years old male complains of mild urethral mucoid discharge after sexual contact with a sex-worker. Examination is normal. Drug used to treat such a patient: September 2012 
Select and explain. 
A. Azithromycin 1 mg single dose, B. Azithromycin 1 mg for 3 weeks, C. Azithromycin 500 mg single dose, D. Azithromycin 1 gram single dose
D: Azithromycin 1 gram single dose
Answer: D: Azithromycin 1 gram single dose 
Explanation: Ans. D i.e. Azithromycin 1 gram single dose The clinical presentation corresponds to a diagnosis of NGLI/ non gonococcal urethritis