Correct option is (d) 1
The best explanation: Ohm’s law states that the potential difference (voltage) across a conductor is proportional to the current through it. The constant of proportionality is called the Resistance(R).
According to Ohm’s law, V = IR (where V is the potential difference between two points which include a resistance R).
–> I = V/R = 1V/1Ω = 1A.