Explanation:

In India, there is no RBI regulated currency as of now. It is in pipeline.

Digital Currency

• It is a payment method which exists only in electronic form and is not tangible.
• It can be transferred between entities or users with the help of technology like computers, smartphones and the internet.
• Although it is similar to physical currencies, digital money allows borderless transfer of ownership as well as instantaneous transactions.
• Digital currency is also known as digital money and cybercash.

Recent Developments

• El Salvador, a small coastal country in Central America, has become the first in the world to adopt Bitcoin, as legal tender.
• Britain is also exploring the possibility of creating a Central Bank Digital Currency (Britcoin).
• In 2020, China started testing its official digital currency which is unofficially called “Digital Currency Electronic Payment, DC/EP”.
• In April 2018, RBI banned banks and other regulated entities from supporting crypto transactions after digital currencies were used for frauds. In March 2020, the Supreme Court struck down the ban as unconstitutional

RBI Commets regarding regulation

There are other reasons why it would be futile to regulate cryptocurrencies. As discussed, cryptocurrencies are not currencies, or financial assets or real assets or even digital assets. Therefore, it cannot be regulated by any financial sector regulator. It is not possible to regulate something that one cannot define. 

Hence only statements 1&3 are correct.