Which version of Xposed should I use for Nexus 5X? Xposed have 3 different versions: arm, arm64 and x86

Which one should I use for Nexus 5X?
The LG Nexus 5X is the first device with Android 6.0(.1) so it's running SDK23.
X86 is only for x86 processors, which except for the ASUS Zenfone, no one is using.
ARM is for usual 32-bit ARM processors (and 32-bit ROMs). This was the standard about 1/2 to 1 year ago.
ARM64 is the newest generation of 64-bit ARM processors and ROMs supporting this architecture. I suspect your phone is 64-bit capable (at least the processor is).


Head over to the official Xposed thread on XDA:
http://forum.xda-developers.com/showthread.php?t=3034811
Download the appropriate Xposed version (xposed-vxx-sdk23-arm64.zip)
Copy it to your device.
Flash it using a custom recovery.