How to check the file versions in oracle EBS ?

How to check the file versions in oracle EBS ?

1. adident Header appvndrb.pls

2. strings -a $AP_TOP/patch/115/sql/appvndrb.pls | grep '$Header'

$ cd $AP_TOP/patch/115/sql

$ strings -a appvndrb.pls | grep '$Header'

$ adident Header <FILE_NAME>  

or 

$ strings -a <FILE_NAME> | grep Header