HOTSPOT
Your company has five hardware builds for client computers. The hardware builds are
configured as shown in the following table.
You plan to provide some users with Windows To Go disks that contain a corporate image of
the 64-bit version of Windows 8 Enterprise and several line-of-business (LOB) applications.
In the table below, identify whether the hardware build is compatible or incompatible with the
Windows To Go disks. Make only one selection in each row. Each correct selection is worth one point.
Answer: 
Only Hardware 1 isn’t compatible :https://technet.microsoft.com/library/hh831833.aspx#wtg_hardware
No mate, Hardware4 is not compatible.
The question specifies that you are deploying 64bit win 8….. which isnt going to run on 32bit hardware… the answers are correct
This question was on my 689 exam.
Based on the link provided by nunya:
Processor architecture: Must support the image on the Windows To Go drive
RAM: 2 GB or greater
Since they’re using 64bit windows to go, then your CPU must be 64bit…based on this requirement alone, you can omit those with 32bit CPU.
correct