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: Anatomy
Ligamentum flavum consists of: 
Select and explain. 
A. Type-II collagen, B. Type-III collagen, C. Reticulin, D. Elastin
D: Elastin
Answer: D: Elastin 
Explanation: Ans. D. ElastinLigamentum flavum connects the laminae of adjacent veebrae.The ligamentum flavum has a high content of elastin. So under tension it can be stretched by 80% without damage.Functions of ligamentum flavum to provide a constant smooth lining to the veebral canal, which is never overstretched in flexion and which never goes slack in extension.