Hey @nkalra in the Zoom desktop client, in Settings, under Audio, you will see your Microphone and Speaker output. Please ensure the right inputs and outputs are selected here and in-meeting. If your inputs and outputs seem to be correct and you're still having trouble, check out some topics on audio issues here support.zoom.us/hc/en-us/sections/200319096.
Thank you, It was a small silly thing. If you right click on the desktop ( at the bottom on menu bar) and go to audio mixer or sound mixer, there is zoom meeting speaker( given that you are in meeting) it was on mute.