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
A child is suffering from dry skin and is mentally retarded-diagnosis ? 
Select and explain. 
A. Vit A deficiency, B. Crebral palsy, C. Hypothyroidism, D. All above
C: Hypothyroidism
Answer: C: Hypothyroidism 
Explanation: Ans. is 'c' i.e., Hypothyroidism