You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is This is seen due commonly due to deficiency of: and explain in detail?
* The given picture shows lesions at angles of mouth (angular cheilitis)- deficiency of vitamin B2 (Riboflavin). * Other features of vitamin B2 deficiency include glossitis, magenta tongue and geographic tongue . * Also have Corneal vascularisation * Image showing corneal vascularisation in vitamin B2 deficiency Cassal necklace--> niacin def. Acrodermatitis enteropathica--> zinc def. Xanthurenic aciduria--> Pyridoxine def.