Which statement is true about interfaces, zones, and routing-instance relationships?
A.
All interfaces in a zone must belong to the same routing instance.
B.
All interfaces in a routing instance must belong to the same zone.
C.
All interfaces in a zone must be in inet.0.
D.
Each interface in a VR must belong to a unique security zone.
http://kb.juniper.net/InfoCenter/index?page=content&id=KB16556
Restrictions:
You can assign one or more logical interfaces to a zone.
You can also assign one or more logical interfaces to a routing instance.
You cannot assign a logical interface to multiple zones or multiple routing instances.
You must also ensure that all a zone’s logical interfaces are in a single routing instance.
Violating any of these restrictions results in a configuration error.