CMHDB generated key for cards stored in CMHDB tables
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External-cm-no
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Internal-cm-no
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Cust-acct-ky
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pcn-no
C
Correct answer
Explanation
CMHDB uses Cust-acct-ky (Customer Account Key) as the generated key for card identification. This is a composite key that uniquely identifies customer-account relationships. External-cm-no and Internal-cm-no are identifiers, while pcn-no is a different numbering system.