This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acquired Cataract, Subject name: Ophthalmology
Drug causing cataract- 
Select and explain. 
A. Amikacin, B. Dexamethasone, C. Chloramphenicol, D. Penicillin
B: Dexamethasone
Answer: B: Dexamethasone 
Explanation: Ans. is ;b' i.e., Dexamethasone o Corticosteroids (dexamethasone) can cause cataract.Types of CataractCausesPosterior subcapsularMyotoic dystrophy, wilson's disease, DM, Atopic dermatitis, Down's syndrome, Corticosteroids, Busulfan, Chloroquine, Trauma, Ionizing radiation, Galactosemia, Senile cataract, Infrared/heat cataract (glass-blower's or glass worker).Anterior subcapsularWilson's disease, DM, Down's syndrome, Trauma, Electric shock, Anticholinesterase, Amiodarone, Senile cataract, Galactosemia.Anterior capsularVoissious ring (Blunt trauma), Gold, Chlorpramazine,NuclearCigarette smoking, Congenital rubella, Ichthyosis, Galactosemia, Senile cataract, DM.CorticalStickler syndrome, Senile cataract, DMAnterior capsular (Polar)Penetration of cornea (Penetrating injury, ophthalmia neonatorum), Congenital cataractPosterior capsular (Polar)Congenital cataract