Final answer:
You cannot deploy two vSphere Replication appliances per vCenter Server; only one replication appliance is supported per vCenter Server.
Step-by-step explanation:
The statement that you can deploy two vSphere Replication appliances per vCenter Server is false. VMware vSphere Replication is a virtual appliance that is used for VM (virtual machine) replication for data protection and disaster recovery in a VMware vSphere environment. Each vCenter Server supports the deployment of only one vSphere Replication appliance. The appliance manages replication of VMs from one host to another within a single vCenter Server, or across different vCenter Servers, but regardless of the deployment size or the number of VMs, only one appliance per vCenter is necessary and supported.