The following ESX versions are supported for direct upgrading to vSphere 4 (Choose Two):
A. ESX 2.1
B. ESX 2.5.5
C. ESX/ESXi 3.5
D. ESX 3.0.0, 3.0.1, 3.0.2
Answer:C
The following ESX versions are supported for direct upgrading to vSphere 4 (Choose Two):
A. ESX 2.1
 B. ESX 2.5.5
 C. ESX/ESXi 3.5
 D. ESX 3.0.0, 3.0.1, 3.0.2
