Which of the following is the correct way to display a PDF file in the browser?

<object type="application/pdf" id="filename.pdf" width="100%" height="100%"/>

<input type="application/pdf" data="filename.pdf" width="100%" height="100%"/>

<object type="application/pdf" data="filename.pdf" width="100%" height="100%"/>

<input type="application/pdf" src="filename.pdf" width="100%" height="100%"/>