This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Types of Genetic Disorders, Subject name: Pediatrics
Frameshift mutation occurs due to: 
Select and explain. 
A. Transition, B. Transversion, C. Inseion, D. Point mutation
C: Inseion
Answer: C: Inseion 
Explanation: A frameshift mutation is caused by a deletion or inseion in a DNA sequence that shifts the way the sequence is read.