OptionalanimationMedia is an animation, information about the animation.
OptionalaudioMedia is an audio file, information about the file; currently, can't be received in a poll.
OptionaldocumentMedia is a general file, information about the file; currently, can't be received in a poll.
OptionallinkThe HTTP link attached to the poll option.
Optionallive_Media is a live photo, information about the live photo.
OptionallocationMedia is a shared location, information about the location.
OptionalphotoMedia is a photo, available sizes of the photo.
OptionalstickerMedia is a sticker, information about the sticker; currently, for poll options only.
OptionalvenueMedia is a venue, information about the venue.
OptionalvideoMedia is a video, information about the video.
Describes media added to a poll or a poll option.
Remarks
At most one of the optional fields can be present in any given object.
See
Telegram Bot API: PollMedia