How will the router handle a packet destined for 192.0.2.156?

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.

Answer: C

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.