Which option shows the configuration syntax for a routed VLAN interface on an EX Series switch?

The configuration syntax for a routed VLAN interface on an EX Series switch is accurately represented in the choice indicating that the VLAN is associated through the l3-interface statement. This is essential as it specifies that the VLAN is intended for Layer 3 routing, thus enabling IP addressing and routing capabilities.

In this case, the presence of the l3-interface command directly links the VLAN itself to the specific IP address configured under that VLAN. This means the switch will treat this VLAN interface as a routed interface, allowing for inter-VLAN routing and ensuring that traffic can be appropriately managed and forwarded between VLANs.

The inclusion of the family inet section under the unit also confirms that the interface is configured to support IPv4 addressing, which is critical for routing. Overall, using the l3-interface designation ensures that the switch understands that it should establish a routing context for the VLAN, facilitating communication with other networks or devices.

Other options lack certain critical elements or employ incorrect terminology that does not accurately represent how routed VLANs need to be configured on EX series switches, resulting in improper configurations for intended functionalities.