Rakesh,
I found the following command that will list out external data set. If it dataset trigger a job you will see "AUTO" in the DSTYPE column.
I recommend you run this in batch because it could be a lot of output. This command will not list the job it triggers, just showing that it triggers a job.
LDSN,DSNBR=DS*,LIST=EXTL
The following command will show all data set and the job it triggers:
LCTLG,DSN=AUTO. (there is a period at the end of the command)
I hope this help....