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: Biochemistry
[{'content': 'Frame shift mutation is caused by: \nSelect and explain. \nA. Deletion, B. Point mutation, C. Substitution, D. Transversion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Frameshift Mutation:\n\nDue to insertion or deletion of nucleotides that are not a multiple of three results in frameshift mutation.\nReading frame is garbled.\n\nReference-\xa0Harper 30th edition page 417', 'role': 'assistant'}]