<prompt> Wrong statement isMees line in arsenic poisoningPterygium of nails in Lichen planusOnycholysis in PsoriasisKoilonychia in Megaloblastic Anemia B12 def  <response>: Koilonychia is seen in iron deficiency anemia not in megaloblastic anemia.Mees line is seen in Arsenic poisoning.Pterygium is diagnostic for lichen planus.Psoriasis can cause onycholysis 