Detailed Explanation:

Correct Answer: ✅ Option 2 (Only three)

India's Unified Payments Interface (UPI) has expanded internationally through partnerships with foreign payment networks and merchants. However, UPI-based international merchant payments are currently available only in selected countries.

✅ I. United Arab Emirates – Correct: UPI is accepted at select merchants in the UAE through partnerships facilitated by National Payments Corporation of India.

✅ II. France – Correct: France became one of the first European countries to accept UPI payments, including at locations such as the Eiffel Tower.

❌ III. Germany – Incorrect: UPI merchant payment acceptance has not been officially rolled out in Germany.

✅ IV. Singapore – Correct: UPI is operational in Singapore for cross-border payments and merchant transactions through linkage arrangements.

❌ V. Bangladesh – Incorrect: UPI merchant payment acceptance is not operational in Bangladesh.

Therefore, among the given countries, UAE, France, and Singapore are the three countries where international merchant payments are accepted under UPI.

Short Notes: UPI Internationalization

• UPI (Unified Payments Interface) was developed by National Payments Corporation of India.

• UPI enables instant real-time digital payments.

• International merchant payments are operational in countries such as UAE, Singapore, France, Bhutan, Nepal, Mauritius, and Sri Lanka.

• UPI helps reduce dependence on international card networks.

• Cross-border UPI services support tourism, remittances, and business transactions.

• UPI is one of the world's largest digital payment platforms.

• The system is regulated by the Reserve Bank of India and operated by NPCI.