|selective|[Bool](../types/Bool.md) | Optional|Use this flag if you want to remove the keyboard for specific users only. Targets: 1) users that are @mentioned in the text of the Message object; 2) if the bot's message is a reply (has reply\_to\_message\_id), sender of the original message.<br><br>Example: A user votes in a poll, bot returns confirmation message in reply to the vote and removes the keyboard for that user, while still showing the keyboard with poll options to users who haven't voted yet|