Hello shrinath1991,
Welcome to Apple Support Communities!
We want to help resolve the issue with the headphones cutting out during calls.
Try the steps here first to help isolate and resolve a connection related issue:
"Improve your Bluetooth connection
Your headphones communicate using Bluetooth, and a Bluetooth signal can be interfered with or weakened in some situations.
Your headphones might lose their connection more often with streaming audio than with content that is stored on your device.* With your device within a few feet of you, try to listen to music or other audio content that is stored on your device—not streamed—with your headphones. On your iOS or Android device, open the Music app. On a Mac with macOS Catalina, open the Music app. On a Mac with macOS Mojave or earlier, or on a PC, open iTunes. Then play a song that does not have the Download button 
next to it. Or tap the Download button to download the song.
If your headphones maintain their connection without distortion during this test, then here are a couple of things that can help in other situations:
- Keep your iPhone or other device close to you, so that no obstructions, like walls or floors, are between you and your device.
- If possible, move to a different place—in particular, move away from places with many people or a lot of Wi-Fi activity, poorly shielded cables, microwave ovens, and wireless speakers (or turn off the oven or speaker)."
This Apple Support page has the full details: If the sound from your wireless headphones cuts out or is distorted - Apple Support
We hope this helps to get the AirPods sounding as expected during the call.
Cheers!
