A user enters their phone number in a form where their name should go. Which kind of error is most likely to occur?

Division by zero
Index out of range
Not enough memory
Data type mismatch

The most likely error to occur in this scenario is a data type mismatch error. This is because the form is expecting the user to enter their name, which is typically a string of characters, but the user mistakenly enters their phone number, which is a numeric value.