Files created with Lotus 1-2-3 have an extension of?
Files created with Lotus 1-2-3 have an extension of?
Explanation
Files created with Lotus 1-2-3 typically have file extensions such as .WK1, .WKS, .WK2, .WK3, .WK4, or .123.
WK1 is a correct extension for files created with Lotus 1-2-3.