Refer to the exhibit.

How will the router handle a packet destined for 192.0.2.156?

A.
The router will drop the packet.

B.
The router will return the packet to its source.

C.
The router will forward the packet via Serial2.

D.
The router will forward the packet via either Serial0 or Serial1.

Explanation:
Router has pointed default router to 192.168.4.1 and this subnet is connected via serial 2 interface.
Router does not have router for the 192.0.2.156. so it will use the default gateway
192.168.4.1. A default route identifies the gateway IP address to which the router sends all IP
packets for which it does not have a learned or static route.