Central Bank Digital Currency / E-Rupee

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1.
What is the name of the digital currency launched by the Reserve Bank of India (RBI)?
2.
Which country first launched a Central Bank Digital Currency (CBDC)?
3.
What is the primary objective of launching a Central Bank Digital Currency (CBDC)?
4.
Which of the following statements is true regarding the Digital Rupee in India?
5.
Which technology forms the backbone of most digital currencies?