A. One Time Password
B. Once and twice password
C. On time Password
D. None of the above

Solution

A. One Time Password

Explanation

<p><span style="font-size: 14px;">A One-Time Password is:</span></p><ul><li><span style="font-size: 14px;">A temporary, unique code</span></li><li><span style="font-size: 14px;">Used for user authentication</span></li><li><span style="font-size: 14px;">Valid for only one login session or transaction</span></li></ul><p><br></p>