What does 10 c mean in a quiz question?

In a quiz question, "10 c" typically refers to a specific answer choice labeled "c" in a multiple-choice format, and it often indicates that the answer corresponds to the 10th question on the quiz. For example, if the quiz consists of several questions with options a, b, c, and d, "10 c" means that the correct answer to the 10th question is option "c."