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: Biochemistry
Folding protein are: 
Select and explain. 
A. GLUT-1, B. Calnexin, C. Cytochrome 450, D. Insulin receptor
B: Calnexin
Answer: B: Calnexin 
Explanation: B i.e. Calnexin,