This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'Toad skin is seen in deficiency of vitamin ? \nSelect and explain. \nA. A, B. B2, C. D, D. Biotin', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., A o Here, essential fatty acid has not been provided as an option. So, amongst the given options vitamin 'A' is the best answer.", 'role': 'assistant'}]