This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNB 2018, Subject name: Pharmacology
Which first line antitubercular drug can result in adverse effects of Eye? 
Select and explain. 
A. Ethambutol, B. Pyrazinamide, C. Rifampicin, D. Isoniazid
A: Ethambutol
Answer: A: Ethambutol 
Explanation: Ethambutol causesRed Green Color Blindness (Optic Neuritis) Initially reversible, later irreversible Avoided in children. Adverse effects of other first line antitubercular drugs: Pyrazinamide :- Hyperuricemia Rifampicin :- Hepatotoxic, Discoloration of secretion Isoniazid :- Hepatotoxic, Peripheral Neuropathy