How should you import an external JavaScript and execute it only after everything else is loaded?

How should you import an external JavaScript and execute it only after

1.	How should you import an external JavaScript and execute it only after everything else is loaded?
Answer» How should you import an EXTERNAL JavaScript and EXECUTE it only after everything else is loaded? Choose the Correct option from Below list (1)< script src="script.js" mode="noblock">< /script> (2)< script ASYNC src="script.js">< /script> (3)< script src="script.js" defer>< /script> (4)< script src="script.js">< /script> Answer:-(3)< script src="script.js" defer>< /script>