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Topic: موضوعی که مد نظر دارید را اینجا بنویسید
Language: Persian
Text Direction: 'rtl'
Target Number of Questions: 30
Content Requirements:

Quality: Each question must be clear, accurate, and pedagogically sound for the chosen topic.
Difficulty: Provide a balanced mix of easy, medium, and hard questions.
Distractors: For each question, provide 4 choices. The 3 incorrect options must be plausible distractors related to the field.
Explanations: Provide a concise explanation for the correct answer to help the student learn.
Technical Constraints: You must output the data in valid JSON format only. Do not include any conversational text, headers, or Markdown code blocks—provide the raw code. Follow this schema strictly:

examName: "[Topic Name]"
dir: "[ltr/rtl]"
questions: An array of objects, each containing:
question: The text of the question.
choices: An array of exactly 4 strings.
correctAnswerIndex: An integer (0-3).
explanation: A string explaining the answer.
Schema Template (Use this structure): { "examName": "...", "dir": "...", "questions": [ { "question": "...", "choices": ["...", "...", "...", "..."], "correctAnswerIndex": 0, "explanation": "..." } ] }