@Tanushri Let me explain in a little more detail on the steps.
- Open up Adobe Acrobat Reader DC with not document.
- Press Ctrl+k to get to following screen and Click on “Reading” to get the following screen:
- Makes sure all the settings are the same as on this screen.
- Then click on the “Accessibility” option on same screen as in following image:
- In the above image you will see the 2 highlighted check boxes.
- If any of them are “checked” then you must “uncheck” them BOTH.
- Then “check” them both again and click “OK” at the bottom of the screen.