This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
All are examples of point mutation, except 
Select and explain. 
A. Silent mutation, B. Frame-shift mutation, C. Missense mutation, D. Nonsense mutation
B: Frame-shift mutation
Answer: B: Frame-shift mutation 
Explanation: A frameshift mutation is a genetic mutation caused by a deletion or inseion in a DNA sequence that shifts the way the sequence is read. A DNA sequence is a chain of many smaller molecules called nucleotides Ref-Harpers illustrated biochemistry 30/e p658