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: Physiology
Which of these is not a pa of extracellular matrix: 
Select and explain. 
A. Laminin, B. Fibronectin, C. Integrins, D. Collagen
C: Integrins
Answer: C: Integrins 
Explanation: C i.e. Integrins- Extracellular matrix proteins are collagen, elastin, fibrillin, fibronectin, laminin and proteoglycans (GAGs) Mn- "Call Ela For Last Prose" Whereas cell adhesion molecules present in cytoplasm or cell membrane include integrins, selectins, cadherins and immunoglobulin family CAMsQ.- Integrins are cell surface adhesion protein that provide linkage between cell outside & inside, between cell- cell and between cell & extracellular matrix.