Difference between public and private blockchain...

What is the main difference between a public and a private blockchain?


Options are:


1-        Public blockchains are faster

2-        Private blockchains are more secure

3-        Public blockchains allow anyone to participate, while private ones restrict access

4-        Private blockchains don`t use cryptocurrenies   



Correct Answer is:


                            Public blockchains allow anyone to participate, while private ones restrict access.