$.$ What is the relationship between IP packet and ethernet frame?

a$)$ Each IP packet is placed inside an ethernet frame or frames.

b$)$ Each ethernet frame placed inside an IP packet or packets.

c$)$ It depends on how the physical media being used. For wireless media each

ethernet frame placed inside an IP packet or packets. For wired media each IP

packet is placed inside an ethernet frame or frames.

d$)$ It depends on whether encryption is being used. For encryption each ethernet

frame placed inside an IP packet or packets. For data that is not encrypted each

IP packet is placed inside an ethernet frame or frames.