How to find version for components in 12.2.x e-business suite

perl $FND_TOP/patch/115/bin/TXKScript.pl -script=$FND_TOP/patch/115/bin/txkInventory.pl -txktop=$APPLTMP -contextfile=$CONTEXT_FILE -appspass=apps -outfile=$APPLTMP/Report_inventory.html

NOTE: make sure there is no 'E' in $APPLTMP

Above will give oracle home version with applied patches, this can be run against Database well. 

you can query version keyword in context file as well just to get versions

grep -i version $CONTEXT_FILE

Regards

Manoj