Which option is a valid IPv6 address?

Which option is a valid IPv6 address?

A.
2001:0000:130F::099a::12a

B.
2002:7654:A1AD:61:81AF:CCC1

C.
FEC0:ABCD:WXYZ:0067::2A4

D.
2004:1:25A4:886F::1

Explanation:
An IPv6 address is represented as eight groups of four hexadecimal digits, each group
representing 16 bits (two octets). The groups are separated by colons (:). An example of an
IPv6 address is 2001:0db8:85a3:0000:0000:8a2e:0370:7334. The leading 0’s in a group can
be collapsed using ::, but this can only be done once in an IP address.