Mr Prasad
Ladies Quota and Senior Citizen Quota/Lower Berth Quota
Both are different.
Ladies Quota Only for Ladies and Male Below 12 Years
No matter you can book more than one passenger in a PNR...
more... in Ladies Quota
For Example Check this pnr 241-0237714
Two passenger are booked in this.
While In Senior Citizen Quota/Lower Berth Quota
Passenger Need to Be Alone.
for Ladies the age must be 45 or above
for gents the age must be 60 or above
The Concession is given only above the age of 60.
In Lower Berth Quota or Senior Citizen Quota the berth alloted will be either Lower or Side Lower only
while in Ladies Quota Any berth can be alloted which is clear from the given PNR.