How to link Aadhaar with your UAN (EPFO)?

Link your Aadhaar with your EPF account using 4 online methods: 1. link Aadhaar through EPFO portal, 2. Link Aadhaar using Umang App, 3. Link Aadhaar using OTP verification, 4. Link Aadhar using biometric credentials on e-KYC Portal