You observe that VPN routes are hidden on your PE router Which situation accounts for these hidden routes?
A.
The protocol next-hop is not found in inet.3
B.
The protocol next-hop is not found in mpls 0
C.
The protocol next-hop is not found in bgp I3vpn 0
D.
The protocol next-hop is not found in inet 2
mpls.0: contains MPLS next hops.
inet.3 contains MPLS path information
Answer should be mpls.0
Priyanka you are wrong. mpls.0 is used on transit routers this question is askign about the PE. A is correct
If routes from the local CE router are not present in the bgp.l3vpn.0 routing table on the remote PE router, do the following:
Check the VRF import filter on the remote PE router, which is configured in the vrf-import statement. (On the local PE router, you check the VRF export filter, which is configured with the vrf-export statement.)
Check that there is an operational LSP or a Label Distribution Protocol (LDP) path between the PE routers. To do this, check that the internal BGP (IBGP) next-hop addresses are in the inet.3 table.
Check that the IBGP session between the PE routers is established and configured properly.
Check for “hidden” routes, which usually means that routes were not labeled properly. To do this, use the show route table bgp.l3vpn.0 hidden command.
Check that the inner label matches the inner VPN label that is assigned by the local PE router. To do this, use the show route table mpls command.
http://www.juniper.net/techpubs/software/junos/junos95/swconfig-vpns/id-11036454.html
so as in answer it is checking for next hope address that should be in inet.3 table
so A should be correct.