What is a valid summary route for IPv6 networks 2001:0DB8:ACAD:4::/64, 2001:0DB8:ACAD:5::/64, 2001:0DB8:ACAD:6::/64, and 2001:0DB8:ACAD:7::/64?

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#1

What is a valid summary route for IPv6 networks 2001:0DB8:ACAD:4::/64, 2001:0DB8:ACAD:5::/64, 2001:0DB8:ACAD:6::/64, and 2001:0DB8:ACAD:7::/64?

  1. 2001:0DB8:ACAD:0000::/63
  2. 2001:0DB8:ACAD:0000::/64
  3. 2001:0DB8:ACAD:0004::/62*
  4. 2001:0DB8:ACAD:0004::/63