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