Why A is correct
PAN stands for Primary Account Number, which is the unique payment card number (typically 14-19 digits) that identifies the card issuer and the individual cardholder account.
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Cardholder Data
Covers cardholder data concepts and practices within PCI DSS.
This question belongs to the "Protect Cardholder Data" domain, which makes up about 20% of the PCI DSS exam.
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