Two long wires each carrying a d.c. current in the same direction are

Two long wires each carrying a d.c. current in the same direction are placed close to each other. Which one of the following statements is correct?

[amp_mcq option1=”The wires will attract each other” option2=”The wires will repel each other” option3=”There will be no force between the wires” option4=”There will be a force between the wires only at the moment when the current is switched ON or OFF” correct=”option1″]