This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Microbial, Subject name: Pharmacology
Common dose dependant side effects of Ethambutol is 
Select and explain. 
A. Red-urine, B. Loss of visual acuity, C. Nephropathy, D. Peripheral neuropathy
B: Loss of visual acuity
Answer: B: Loss of visual acuity 
Explanation: (Loss of visual acuity) (701-KDT) (742-43-KDT 6th)ETHAMBUTOL - It is distributed widely but penetrates meninges incompletely and is temporarily stored in RBC's* * Loss of visual acuity/ colour vision, field defects due to optic neuritis is the most important dose and duration of therapy dependent toxicity.* It should not be used below 6 years of age.* * Hyperuricemia is due to interference with urate excretion.