Which option is the correct expansion for PIN?

• A. Personal Identification Name
• B. Personal Internet Number
• C. Personal Index Number
• D. Personal Identification Number

Answer: (D)

PIN stands for Personal Identification Number. This is the standard term used for the numeric code you enter to verify your identity, such as at ATMs or card readers. The other phrases—Personal Identification Name, Personal Internet Number, and Personal Index Number—do not reflect common security terminology and do not match what PIN represents. So the correct expansion is Personal Identification Number.