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
Infant with no social smile, no eyebrows, protruded tongue. Diagnosis - 
Select and explain. 
A. Cretinism, B. Down's syndrome, C. Mucopolysaccharidosis, D. Rickets
A: Cretinism
Answer: A: Cretinism 
Explanation: Ans. is 'a' i.e., Cretinism