Educational Quiz Generator

Create a [DIFFICULTY] level quiz on [TOPIC] for [AUDIENCE]. Generate [NUMBER] questions using this mix: 40% multiple choice (4 options), 30% true/false with explanation, 20% fill-in-the-blank, 10% short answer. For each question: provide the correct answer, explain why it is correct, and explain why wrong options are wrong (for MCQs). Add a difficulty rating (1-5) for each question.