The QBASIC keywords that do not include are "FIND B". This is because "FIND B" is not a valid QBASIC keyword.
On the other hand, "LET C", "REM D", and "STOP" are valid QBASIC keywords. "LET" is used to assign a value to a variable, "REM" is used to add a comment in the code, and "STOP" is used to halt the execution of the program.
It's important to note that QBASIC keywords are specific words that have a predefined meaning in the QBASIC programming language. Understanding these keywords is essential for writing correct and functional QBASIC programs.