Which of the following anti-tubercular drug can cause ophthalmological toxicity?
(A) Isoniazid (B) Rifampicin (C) Ethambutol (D) Pyrazinamide
(C) Ethambutol side effect: causes Red Green color blindness (Ophthalmological toxicity) Isoniazid side effects: Neurotoxicity, Hepatotoxicity. Pyrazinamide side effects: Hyperuricemia (gouty ahritis). Rifampicin side effects: Hepatotoxicity, orange red urine and tears etc.