Which of the following IP addresses is the loopback address in IPv6?

Which of the following IP addresses is the loopback address in IPv6?

A.
0:0:0:0:0:0:0:1

B.
0:0:0:1:1:0:0:0

C.
0:0:0:0:0:0:0:0

D.
1:0:0:0:0:0:0:0

Explanation: