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The major industry identifier (MII) for master card is :

  • A.3
  • B.4
  • C.5
  • D.6

Answer: C

The major industry identifier for Mastercard is 5.

The first digit of a payment card number is the major industry identifier (MII) under ISO/IEC 7812. Digits 4 and 5 both denote banking and financial cards; Visa numbers begin with 4 and Mastercard numbers have traditionally begun with 5 (51-55), so a Mastercard's MII is 5. Since 2017 Mastercard has also issued a 2-series range.

3 is the travel and entertainment digit used by American Express and Diners Club, 4 is Visa, and 6 is used by Discover and RuPay. Forensic examiners check this digit when screening a card number for forgery.

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