What is IPv6 router solicitation?
A. arequest made by a node to join a specified multicast group
B. arequest made by a node for its IP address
C. arequest made by a node for the IP address of theDHCP server
D. arequest made by a node for the IP address of thelocal router
Answer D:
IPv6 Neighbor Solicitation Message
A value of 135 in the Type field of the ICMP packet header identifies a neighbor solicitation message. Neighbor solicitation messages are sent on the local link when a node wants to determine the link-layer address of another node on the same local link (see the figure below).
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6_basic/configuration/xe-3s/ip6b-xe-3s-book/ip6-neighb-disc-xe.html