In electric charge interactions, opposite charges attract. Therefore, the correct choice is b) positive and negative, as these charges will attract each other. The other options involve repulsion among like charges.
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In electric charge interactions, opposite charges attract while like charges repel. Therefore, positive and negative charges will attract each other, making option b) the correct choice. Options a) and c) involve repulsion, and option d) is incorrect in identifying the combinations of attraction and repulsion. ;