[{"id": 1, "type": "multiple_choice", "options": ["Mitochondria", "Nucleus", "Ribosome", "Cell membrane"], "question": "What organelle is known as the \"powerhouse of the cell\"?", "correct_answer": "Mitochondria"}, {"id": 2, "type": "multiple_choice", "options": ["O₂", "H₂O", "NaCl", "CO₂"], "question": "What is the chemical symbol for water?", "correct_answer": "H₂O"}, {"id": 3, "type": "multiple_choice", "options": ["O₂", "H₂O", "NaCl", "CO₂"], "question": "What is the chemical symbol for water?", "correct_answer": "H₂O"}, {"id": 4, "type": "multiple_choice", "options": ["Igneous, sedimentary, metamorphic", "Hard, soft, medium", "Large, small, tiny", "Red, gray, black"], "question": "What are the three types of rocks?", "correct_answer": "Igneous, sedimentary, metamorphic"}, {"id": 5, "type": "multiple_choice", "options": ["NaCl", "CO₂", "O₂", "H₂O"], "question": "What is the chemical symbol for water?", "correct_answer": "H₂O"}, {"id": 6, "type": "multiple_choice", "options": ["Large, small, tiny", "Red, gray, black", "Igneous, sedimentary, metamorphic", "Hard, soft, medium"], "question": "What are the three types of rocks?", "correct_answer": "Igneous, sedimentary, metamorphic"}, {"id": 7, "type": "multiple_choice", "options": ["NaCl", "CO₂", "O₂", "H₂O"], "question": "What is the chemical symbol for water?", "correct_answer": "H₂O"}, {"id": 8, "type": "multiple_choice", "options": ["Igneous, sedimentary, metamorphic", "Hard, soft, medium", "Red, gray, black", "Large, small, tiny"], "question": "What are the three types of rocks?", "correct_answer": "Igneous, sedimentary, metamorphic"}]