Nobody's sure, whether it's episode or promo, people suspecting it to be promo because itni jaldi goadbharai kese, and some people suspecting it to be episode because of whole grand setup and whole cast is present fully decked up, why would they spend so much for just a promo.
Also Sai's one is not clear whether she's having baby bump or not, most probably not, but she's dressed up like Pakhi, while Pakhi's huge baby bump is clearly shown in the BTS, means Pakhi is def pregnant, Sai's status is unclear.

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