<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 25-year-old man presents to the emergency department with bilateral eye pain. The patient states it has slowly been worsening over the past 48 hours. He admits to going out this past weekend and drinking large amounts of alcohol and having unprotected sex but cannot recall a predisposing event. The patients vitals are within normal limits. Physical exam is notable for bilateral painful and red eyes with opacification and ulceration of each cornea. The patients contact lenses are removed and a slit lamp exam is performed and shows bilateral corneal ulceration. Which of the following is the best treatment for this patient?? A: Acyclovir, B: Erythromycin ointment, C: Gatifloxacin eye drops, D: Intravitreal vancomycin and ceftazidime, E: Topical dexamethasone and refrain from wearing contacts,  <response>: Based on the description in the question stem, this patient likely has a corneal infection caused by wearing contact lenses while intoxicated and possibly exposing his eyes to pathogens during unprotected sex. The key findings are bilateral eye pain, redness, corneal opacification and ulceration, which point towards an infectious process. The treatment options provided include antivirals, antibiotics, steroids, and antifungals. Acyclovir treats herpes viruses, erythromycin treats chlamydia and other bacteria, gatifloxacin is a broad-spectrum antibiotic, vancomycin and ceftazidime are broad-spectrum antibiotics used for more severe infections, and dexamethasone is a steroid.The best initial treatment would be a broad-spectrum topical antibiotic like gatifloxacin to cover both gram positive and negative organisms. Steroids may worsen the infection and are not first-line. Antivirals are not indicated unless herpes infection is confirmed. Combination intravitreal antibiotics are too aggressive as initial therapy.C: Gatifloxacin eye drops 