A consumer purchasing a commodity X will maximize his satisfaction if
Answer Details
A consumer purchasing a commodity X will maximize his satisfaction when the price of commodity X (Px) is equal to the marginal utility of commodity X (MUx). In other words, the consumer will buy more units of commodity X until the point where the additional satisfaction gained (MUx) is equal to the price paid for each unit (Px). So the correct option is "Px = MUx".