 In this question, we are asked to identify which is the best reducing agent from these given options. And the data given here are the standard reduction potentials of aluminum, magnesium, copper and iodine. So you can pause the video here and give this a try and we'll continue after that. To solve this, let's look at the standard reduction potential values. So we know that higher the value of the standard reduction potential, more is the likelihood of reduction. And because we know that reduction and oxidation are complementary processes, we know that higher the likelihood of reduction, lower the likelihood of oxidation. So we can say that higher the reduction potential, easier the reduction and harder the oxidation. And we know something about the reducing agent. So a good reducing agent is one that oxidizes easily. So if we want the reducing agent to undergo oxidation easily, the value of its reduction potential must be low because these are inversely related. So the best reducing agent out of these options would be the one with the lowest values of standard reduction potential. So if you look at these values, the lowest value is for magnesium. And so the best reducing agent is magnesium.