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: Ophthalmology
Which of the following is not given in ophthalmia neonatorum – 
Select and explain. 
A. Erythromycin locally, B. Tetracycline 1%, C. Penicillin locally, D. Silver nitrate
D: Silver nitrate
Answer: D: Silver nitrate 
Explanation: Prophylactic use of 1% silver nitrate (Crede's method) is obsolete now.
Erythromycin and tetracycline ointment are frequently used for prophylaxis. Penicillin is used for treatment of sensitive strains of gonococci.