The question requires us to determine if the following sentence is true or false: "A (-1) charge is repelled by a (+1) charge"
According to Coulomb Law, electric charges at rest (not moving) present the following properties:
a) Similar charges repel each other, while opposite charges repel each other;
b) The attraction or repulsion occurs along the line between the two charges;
c) The size of the force varies inversely with the square of the distance between the two charges;
d) The value or size of the force is directly proportional to the value of each charge.
Therefore, according to property a listed above, opposite charges should not repel each other (As the sentence from the question affirms), but actually they attract each other. The sentence given by the question is false because the charges (-1) and (+1) are opposites and should attract one another.