<prompt> Parenchymatous xerosis of conjunctiva is caused by a Trachomab Vitamin A deficiencyc Vernal catarrhd Phlyctenular keratoconjunctivitise Alkali burnsaebabad  <response>: Parenchymatous xerosis :- Trachoma, Diphtheria conjunctivitis, SJS, Pemphigus, Thermal chemical radiational burn, lagophthalmos due to symblepharon.Epithelial xerosis:- Vitamin A deficiency Xerophthalmia. 