Explanation:
Box 1: 5
A public and a private IP address can be assigned to a single network interface.
Box 2: 1
You can associate zero, or one, network security group to each virtual network subnet and network interface in a virtual machine. The same network security group can be associated to as many subnets and network interfaces as you choose.

Reference:
https://docs.microsoft.com/en-us/azure/virtual-network/virtual-network-network-interface-addresses