<prompt> In xerophthalmia classification X2 stage is -Bitots spotsCorneal xerosisCorneal ulcerationCorneal scar  <response>: xeraphthalmia:- The most characteristic and specific signs of vitamin A deficiency are eye lesions. These develop before the age of 2years. The term xerophthalmia comprises all the occular manifestations of vitamin A deficiency. WHO classification 1982 The new xerophthalmia classification is as follows: XN Night blindness X1A Conjunctival xerosis X1B Bitots spots X2 Corneal xerosis X3A Corneal ulceration affecting less than one-third corneal surface. X3B Corneal ulceration affecting more than one-third corneal surface. XS Corneal scar due to xerophthalmia XF Xerophthalmic fundus. Ref: Khurana 7the p.487 