How will the device respond?

A packet enters a Junos device. No matching destination entry exists in the forwarding table.

How will the device respond?
A . The RE responds to the source with a destination unreachable notification message
B . The PFE responds to the destination with a source unreachable notification message
C . The PFE responds to the source with a destination unreachable notification message
D . The RE responds to the destination with a source unreachable notification message

Answer: B