You have an Azure subscription that contains the public IP addresses shown in the following table.

You plan to deploy a NAT gateway named NAT1.

Which public IP addresses can be used as the public IP address for NAT1?

A. IP3 only

B. IP5 only

C. IP2 and IP4 only

D. IP1, IP3 and IP5 only

E. IP3 and IP5 only

Explanation:
Only static IPv4 addresses in the Standard SKU are supported. IPv6 doesn’t support NAT.

Reference:
https://docs.microsoft.com/en-us/azure/virtual-network/nat-gateway/nat-overview