JSON array of objects with keys: number, question, option_a, option_b, option_c, option_d, correct_answer
Multi-answer: "correct_answer": "a,c"
[
{
"number": 1,
"question": "Apa ibu kota Indonesia?",
"option_a": "Jakarta",
"option_b": "Bandung",
"option_c": "Surabaya",
"option_d": "Medan",
"correct_answer": "a"
},
{
"number": 2,
"question": "Berapa hasil 2 + 2?",
"option_a": "3",
"option_b": "4",
"option_c": "5",
"option_d": "6",
"correct_answer": "b"
}
]