Which government program launched in 2016 has become the world's largest biometric-based digital payment infrastructure, enabling direct benefit transfers and reducing corruption in public distribution?

In recent years, governments worldwide have been modernizing their payment systems to improve public service delivery and financial inclusion. These retail payment innovations have transformed how citizens interact with government services, from tax payments to social benefits distribution. Test your knowledge about a landmark government payment system initiative that changed how an entire nation conducts transactions with its government.

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India's Unified Payment Interface (UPI)
Estonia's e-Governance Payment Portal
India's Aadhaar-enabled Payment System (AePS)
Singapore's GovTech PayNow System