Bootcamp - MacBook Air 2018 - Windows 10 - No Sound

I recently got MacBook Air 2018 edition and I am running the latest MacOS Mojave v10.14.3.

I used the Bootcamp assistant to install Windows 10. After installation, the bootcamp assistant auto-launch didn't launch properly. So, I went to the D drive where MacOS keeps bootcamp files. Used the D:\BootCamp\setup.exe file to install all the Windows supporting software. Everything went fine and the things started working.

However, I noticed that I am not getting any sound even though the sounds setting shows Speakers Apple Audio Device working fine. The sound properties of the speaker shows enabled.

When I put a USB C headphone in the USB C slot of MacBook Air, I am able to get the sound. However, in the standard laptop speakers sound is not coming.

Do share if anyone has a solution for this issue. Thanks.