Which one of these strings is the only valid JSON string?
A) { "cities": ("New York", "Palo Alto", "Boston") }
B) { "cities": {"New York", "Palo Alto", "Boston"} }
C) [ "cities": {"New York", "Palo Alto", "Boston"} ]
D) { "cities": ["New York", "Palo Alto", "Boston"] }

Question

Quizplus · Accepted Answer

Option D is the only valid JSON string because it follows the proper syntax with the use of curly braces to enclose key-value pairs, double quotes to surround keys and string values, and square brackets to contain arrays. Options A, B, and C are invalid because they use parentheses instead of square brackets or curly braces to define arrays or objects in JSON syntax.

Which One of These Strings Is the Only Valid JSON