Begonia species/ hybrids- Mumbai

Mumbai, MH :: Cutivated Begonia for ID :: ARK2019-109 : 3 posts by 2 authors. Attachments (2) - around 900 kb each.
This Begonia was seen in a cultivated garden in April 2014.
Requested to please ID, if possible.
There are so many hybrids, it is difficult to identify.
Yes ..., I understand.
I tried to compare these pics with the ones we have on efi, but found no match.