I dont think that it is only for ladies travelling alone......ladies with other male passengers/s can still avail LD quota..

Male passengers not allowed. Only kids below 12 and travelling with ladies are entitled for the Ladies Quota.

Ok, so ladies quota mean A lone lady on a single tkt? or a ladis travelling with kid below 12 age? or is it valid if lady travels with Adult males?

In a same PNR a lady can avail LD quota and other male passenger can be alloted any quota other than LD quota.
He specifically meant - "It is for ladies travelling alone"

The system tries to provide compact reservation. So when a lady applies for a berth under ladies quota when her berth is to be booked along with those of male passenger(s) under the same PNR, the berth allotted under ladies quota may not be compact together with the berth(s) of male passenger(s).

The Rule : In case a lady passenger alone or with children under 12 years, is willing to reserve berth/berths in ladies quota wherever earmarked, she can give choice 'Ladies' in the field of quota. If berths are available in ladies quota the system will allot accommodation in ladies cabin otherwise accommodation will be allotted in General quota.

You can check this - /pnr/post/352164

Yes, this is correct. Thank you.

Thank you for the link and the corollary explanation. Here one of the bookings was in waitlist. And you can see the berth for the lady is in a different coach. This is what I wanted to stress. It is not like passengers travelling in general quota in which case compact accommodation is provided and they travel together. Whether the ladies quota berths and the general quota berths are booked together or not, the same situation emerges. The ladies quota berths are given where they are located and the general quota berths are allotted where they are located.

Yes, thank you for the link.