Regarding PVLAN diagram question:
Switch was in VLAN 300
Isolated Host 1 on VLAN 301
Host 2 and Host 4 on VLAN 303 or something (Community PVLAN)
Server is connected to Switch.
All host connects to switch.

A.
Host 2 (Host is part of community PVLAN).

B.
Other devices on VLAN XXX (VLAN were isolated host is connected, in my case it was Host 1).

C.
Server

D.
Host 4 (Host is part of community PVLAN)

Explanation:
Host 3 is not part of anyh PVLAN. It is also connected to switch.
So, Host 3 was not an option otherwise it could also be an answer.