下列选项中JSON对象格式表示方法正确的是？（ ）
jsonObject = ["name": "John", "age": 30, "city": "New York"]
jsonObject = ['name': 'John', 'age': 30, 'city': 'New York']
jsonObject= {"name": "John", "age": 30, "city": "New York"}
jsonObject = {"name": "John"; "age": 30; "city": "New York"}