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: Pathology
Familial amyloidotic polyneuropathy is due to amyloidosis of nerves caused by deposition of - 
Select and explain. 
A. Amyloid associated protein, B. Mutant Calcitonin, C. Mutant Transthyretin, D. Normal transthyretin
C: Mutant Transthyretin
Answer: C: Mutant Transthyretin 
Explanation: None