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 the following is/are extracellular matrix protein: 
Select and explain. 
A. Collagen, B. Laminin, C. Fibronectin, D. All
D: All
Answer: D: All 
Explanation: A, B, C i.e. Collagen, Laminin, Fibronectin