With reference to ‘Bitcoins’, sometimes seen in the news, which of the following statements is / are correct?

1. Bitcoins are tracked by the central banks of the countries.

2. Anyone with a Bitcoin address can send and receive Bitcoins from anyone else with a Bitcoin address.

3. Online payments can be sent without either side knowing the identity of the other.

Select the correct answer using the code given below :

I.A.S. (Pre) 2016