Arecaceae members- Indian Bot. Garden, Kolkata

Palm Kolkata Bot garden. For ID

.

Oil palm?

Looks different from Oil palm as per details at
https://en.wikipedia.org/wiki/Palm_oil

.

Palm Kolkata Bot garden. For ID

Trachycarpus takil Becc. ??

Bismarckia nobilis Hildebr. & H.Wendl. is also possible if it is simply planted for curiosity and not for conservation.
Otherwise if for conservation of Indian species, we have rare Trachycarpus fortunei (Hook.) H.Wendl. and Trachycarpus takil Becc.
If from outside India, we can not say.

.

Palm Kolkata Bot garden. For ID

Licuala spinosa Wurmb ??

Rhapis excelsa (Thunb.) Henry is also possible.

.

Palm Kolkata Bot garden. For ID

Closest I can go as per comparative images is Bismarckia nobilis Hildebr. & H.Wendl.

Bismarckia nobilis Hildebr. & H.Wendl. is also possible if it is simply planted for curiosity and not for conservation.
Otherwise if for conservation of Indian species, we have rare Trachycarpus fortunei (Hook.) H.Wendl. and Trachycarpus takil Becc.
If from outside India, we can not say.