Unable to parent bones (not getting the 'keep offset' option)

Here Im trying to parent the hand bone and the shoulder bone to the root bone. But every time I try to parent them the only option i get is "Connected" but i need the the "keep offset" option. If I try to parent it from the object mode using the pipette THIS happens. What am i supposed to do here? I’ve been trying to follow this tutorial but Im stuck at 2:09 (https://www.youtube.com/watch?v=WjAJHrLGvBE)