This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Malnutrition, Subject name: Pediatrics
This is seen due commonly due to deficiency of: 
Select and explain. 
A. Vitamin B1, B. Vitamin B2, C. Niacin, D. Vitamin B12
B: Vitamin B2
Answer: B: Vitamin B2 
Explanation: * 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.