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 drug can be used topically in eye: September 2007 
Select and explain. 
A. Erythromycin, B. Ganciclovir, C. Clindamycin, D. Tetracyclines
D: Tetracyclines
Answer: D: Tetracyclines 
Explanation: Ans. D: Tetracyclines Tetracyclines are broad spectrum antibiotics with considerable bacteriostatic action against both gram-positive and gram-negative organisms as well as some fungi, rickettsiae and the chlamydiae. They are essentially used in the form of drops or ointment for superficial ocular infections such as trachoma. They get deposited in bones and teeth and hence not to be used in children and pregnant/lactating women.