Which of the following is an example of multifactor authentication?1 pointBank card and PIN provided by the bankUsername and passwordBank card and PIN texted to a smartphoneFingerprint and retina scan

The example of multifactor authentication among the options given is "Bank card and PIN provided by the bank" and "Fingerprint and retina scan".

Multifactor authentication (MFA) is a security system that requires more than one method of authentication from independent categories of credentials to verify the user's identity for a login or other transaction.

1. "Bank card and PIN provided by the bank" - This is an example of two-factor authentication where the bank card is something you have and the PIN is something you know.

2. "Fingerprint and retina scan" - This is also an example of two-factor authentication where both the fingerprint and retina scan are something you are.

The other options "Username and password" and "Bank card and PIN texted to a smartphone" are not examples of multifactor authentication. The first is a single-factor authentication (something you know) and the second is still single-factor as both pieces of information are in the same category (something you have).