This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Actin is attached to z line by 
Select and explain. 
A. Titin, B. Alfa actinin, C. Both, D. None
B: Alfa actinin
Answer: B: Alfa actinin 
Explanation: Actin filament is attached to z line by alfa actinin Ref:Guyton and Hall textbook of medical physiology 12th edition,page number: 86,87