With reference to 'Bitcoins', sometimes seen in the news, which of the following statements is/are correct? [IAS Prelims 2016] 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.

• A. 1 and 2 only       
• B.       2 and 3 only
• C. 3 only                          
• D. 1, 2 and 3