Using AlwaysOn for different subnets

Hi all,

I have 3 servers:

Server A: --> 192.168.108.2

Server B: --> 192.168.108.4

Server C: --> 192.168.100.1

I want to have Server A as primary and Server B & C as secondary replicas. Is that possible?

Actually I need Server B as failover but Server A doesn't need to failover Server C because Server C acts like a backup.

Many thanks in advance,

Leila