This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins and Nutritional Deficiencies, Subject name: Social & Preventive Medicine
[{'content': 'Phrynoderma is deficiency of:- \nSelect and explain. \nA. Zinc, B. EFA, C. Selenium, D. Iodine', 'role': 'user'}, {'content': "Answer: B \nExplanation: NUTRITIONAL DEFICIENCIES:- Vitamin B2 Zinc Vitamin B6 Vitamin E Chromium Zinc EFA Selenium Increase circumcorneal congestion Acrodermatitis enteropathica Seizures (infant) Progressive external Opthalmoplegia Glucose Intolerance Liver disease, Growth failure Phyrnoderma (toad like skin) - Treated by supplementing B-complex vitamin & safflower oil. Endemic cardiomyopathy (Keshan's disease)", 'role': 'assistant'}]