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
Nasal valve is formed by - 
Select and explain. 
A. Upper lateral cartilage, B. Lower lateral cartilage, C. Lower end of upper lateral cartilage, D. Upper end of lower lateral cartilage
C: Lower end of upper lateral cartilage
Answer: C: Lower end of upper lateral cartilage 
Explanation: The upper limit of vestibule on the lateral wall is marked by limen nasi (nasal valve) which is formed by the caudal (inferior) margin of upper lateral cartilage.