Code and Output for center:

Code:

    <!DOCTYPE html>
    <html>
    <head>
      <style>
      h1 {text-align:center;}
      p {text-align:center;}
      div {text-align:center;}
      </style>
    </head>
    <body>
      <h1>App Genesis soft solutions pvt ltd</h1>
      <p>App Genesis soft solutions pvt ltd</p>
      <div>App Genesis soft solutions pvt ltd</div>
    </body>
    </html>
  

Output:

App Genesis soft solutions pvt ltd

App Genesis soft solutions pvt ltd