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
Kartagener's syndrome-Characteristic is - 
Select and explain. 
A. Absence of cilia, B. Cilia undeveloped, C. Ultra structural abnormality of cilia, D. None of the above
C: Ultra structural abnormality of cilia
Answer: C: Ultra structural abnormality of cilia 
Explanation: None