Which of the following statement is true concerning serial number searches and matches in the NCIC Gun File?

If the serial number exceeds $20$ characters, the rightmost $20$ characters should be inquired upon first. If the response is negative, the leftmost characters should be queried.

Alphabetic characters appearing between numeric characters $($embedded alphabetic characters$)$ in a serial number are not considered for matching purposes.

Some agencies formerly placed records on file after deleting the embedded alphabetic characters.

All of the above