###Rationale: Prolonged use of high doses (as needed for rheumatoid ahritis, DLE, etc.) may cause loss of vision due to retinal damage. Corneal deposits may also occur and affect vision, but are reversible on discontinuation. ESSENTIALS OF PHARMACOLOGY page no. 823

###Answer: OPTION B IS CORRECT.
###Question: Which of the following drug is deposited in the retina?
###Options:
A. Isoninazid
B. Chloroquine
C. Rifampicin
D. Pyrizinamide
