The correct answer is Both 1 and 2. Important Points Aadhaar Authentication is the process wherein Aadhaar number, along with other attributes, including biometrics, are submitted online to the Central Identities Data Repository for its verification and such a repository verifies the correctness, or the lack thereof, on the basis of the information available with it. An authentication request is entertained by the UIDAI only upon a request sent by a requesting entity electronically in accordance with its regulations. The modes of authentication include Demographic Authentication, one-time pin-based authentication, Biometric-based authentication, Multi-factor authentication. According to Nandan Nilekani’s blog in Times of India in 2016, Aadhaar provides open Application Programming Interfaces or APIs, which can be integrated easily into any electronic device. These APIs enable online authentication using a fingerprint or iris. Hence, both statements are right.