Final answer:
The sugar to egg white ratio in a low sugar meringue can vary, but a plausible ratio could be 1:2, meaning one unit of sugar to two units of egg whites. This ratio, however, may differ depending on the specific recipe used.
Step-by-step explanation:
The sugar to egg white ratio in a low sugar meringue is not typically fixed, as it can vary depending on the recipe. However, traditional meringue ratios often range from 1:1 to 2:1 sugar to egg whites based on weight. A low sugar meringue would likely have less sugar than the egg whites, potentially making option c (1:2) a plausible ratio, meaning for every unit of sugar, there are two units of egg whites. However, the correct ratio for a specific low sugar meringue recipe can vary and should be determined based on the recipe's instructions.