Answer:
The correct subnet mask for the given IP address 192.160.99.110/16 is 255.255.0.0. This is because the /16 notation indicates that the first 16 bits of the IP address are for the network portion, and the remaining 16 bits are for the host portion. The subnet mask 255.255.0.0 corresponds to the first 16 bits being designated for the network, as required.