To answer this question, we need to understand the different parameters that can be used on a JOB statement in a job control language (JCL).
A. MSGCLASS - This parameter specifies the message class to which the job's output messages will be directed. It can be used on a JOB statement.
B. COND - This parameter specifies the condition under which the job will be executed. It can be used on a JOB statement.
C. MGMTCLAS - This parameter is used to specify the management class for the job. However, this parameter cannot be used on a JOB statement. It is not a valid parameter for the JOB statement.
D. NOTIFY - This parameter specifies the user or group that will be notified when the job completes. It can be used on a JOB statement.
Therefore, the correct answer is C. MGMTCLAS. This parameter cannot be used on a JOB statement.