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: Surgery
In tracheostomy, the entry into the trachea is through the: 
Select and explain. 
A. Cricoid cartilage, B. First tracheal ring, C. Second and third tracheal ring, D. Fourth and fifth tracheal ring
C: Second and third tracheal ring
Answer: C: Second and third tracheal ring 
Explanation: None