Is this a JSON string?

Is this a JSON string?

References

Reference NO 1

http://www.json.org/

Reference NO 2

http://stackoverflow.com/questions/3710204/how-to-check-if-a-string-is-a-valid-json-string-in-javascript-without-using-try

Reference NO 3

http://en.wikipedia.org/wiki/JSON

Reference NO 4

https://developer.mozilla.org/en-US/docs/JSON

Reference NO 5

https://moodle.org/mod/forum/discuss.php?d=205936

Reference NO 6

http://jsonlint.com/

Reference NO 7

http://docs.python.org/library/json.html

Reference NO 8

http://api.jquery.com/jQuery.parseJSON/