This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular Trauma, Subject name: Ophthalmology
[{'content': 'Most serious injury to eye is caused by: \nSelect and explain. \nA. Nitric acid, B. Hydrochloric acid, C. Sulphiric acid, D. Lime', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: d (Lime) Ref: AK Khurana, 4th ed, p. 414In general the serious chemical bums are caused by alkalies & acids of which more serious ones are alkali bums. Alkali bumsAcid bumsAgentLime, caustic soda, caustic potashLiquid ammonia ( most harmful)Sulphuric acid, citric acid, hydrochloric acidMechanismSaponification of fatty acids in the cell membraneExtract water - total necrosisSoftening & gelatinizationAll result in increased penetration into tissuesCoagulation of all the proteins which then act as barriers & prevent deeper penetration of acids into tissuesRxImmediate & thorough washThen weak acids (eg. Boric acid ) neutralizationImmediate & thorough washThen weak alkali(sodiumcarbonate) neutralization', 'role': 'assistant'}]