What is the equivalent of one liter in cups?

One liter is equivalent to approximately 4.2 cups, making the choice of 4.2 cups the correct answer. This conversion is based on the fact that 1 liter is equal to about 4.22675 US cups. Thus, rounding this figure gives the commonly accepted approximation of 4.2 cups per liter.

Understanding this conversion is vital in various scenarios, such as cooking or measuring liquids, where precise quantities may be necessary. In contrast, the other numerical options do not reflect the proper conversion factor for liters to cups and would lead to inaccuracies in measurements.