In an ionic bond: A. both atoms share their electrons.

B. one atom accepts electrons from another.

C. The atoms attract each other but their electrons do not interact.

D. The atoms swap electrons​

In an ionic bond :

=》B. one atom accepts electrons from another.

in this bond an atom ( metallic ) loses its electrons and another atom ( non- metallic ) accepts the electrons, and since there isn't the equal positive and negative charges in the atoms, they forms cations ( +ve charge ) and anions ( -ve charge )

and get stacked or attracted to each other by strong electrostatic force.

indium, and thallium have three electrons i think