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: Forensic Medicine
With respect to dating of a bone, a bone more than 100 years old contain: Karnataka 11 
Select and explain. 
A. 7 amino acids, B. 9 amino acids, C. 6 amino acids, D. 8 amino acids
A: 7 amino acids
Answer: A: 7 amino acids 
Explanation: Ans. 7 amino acids