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: ENT
Syndrome associated with anosmia is: 
Select and explain. 
A. Goldenhar syndrome, B. Kallmann syndrome, C. Prader Willi syndrome, D. All of the above
B: Kallmann syndrome
Answer: B: Kallmann syndrome 
Explanation: The most well-known type of congenital anosmia is Kallmann syndrome, an X-linked disorder. Caused by mutation in the KAL gene, Kallmann syndrome is characterized by hypogonadotropic hypogonadism, which results when olfactory receptor neurons and neurons synthesizing gonadotropin-releasing hormone fail to migrate from the olfactory placode.