Eg.
1. GNWL - WL 100
TQWL - WL 50
PT - Avbl 20
Other quotas Availability - 70
In...
more... this case PT is Avbl, so that 20 seats will be used to clear TQWL till WL 20. Now other quota seats will be allotted to clear RAC, then GNWL.
2. GNWL - WL100
TQWL - WL 50
PT - NA
Other Quota Availability - 70
In this case TQWL will not get preference as PT is NA. The 70 unused seats will go to RAC, GNWL.