I have made all these shots, not always intentionally...
Those will all potentially work, but given that the hog is quartered toward you in the image, I would put my money on the low left shot. That looks to be a shot that if it doesn't connect with the back of the head (and it may not), then it looks like it should take out the spine.
The ear shot may actually pass behind the head and not do damage if you are off just slightly, the ear being located at the very pack of the head. If it connects with bone, it may do the damage needed via brain trauma from the destruction of the skull. Note that his is the thickest part of the skull where the neck muscles connect. You can actually have a bullet enter bone and exit bone and have it completely miss the brain that is located more toward the eye from that point.
The top of the head shot is going to hit only bone. It may kill the hog just fine, but that shot is not directly aimed at anything vital. It also may not kill the hog. Given how high your placement is, it may end up like this similar shot on a perfectly broadside hog (see attached pic)
I have made the nose shot a couple of times. It is NOT a good shot to make. You may get a kill from hydrostatic shock (I have), but you may also have a hog dancing around and shaking its head trying to shake off whatever is getting it in the snout. At that point, assuming the hog isn't running away from the area, you have an exceptionally hard target to hit. DO NOT MAKE THIS SHOT.
Placement between the eye and ear at eye level (with head up), a shot you didn't make, would be a more ideal shot to make, placing the bullet to go through the brain itself.
Given that the hog head is quartered toward you, bringing ear shot forward by about an inch would be much more preferable. If the hog head was quartered away, your placement would be great.
The shot below the ear should work whether the hog is quartered toward you, away from you, or is broadside.
The top of the head shot with the head raised like this is not ideal at any time.
The nose shot below the eye isn't bad placement for a hog facing you, but isn't good for broadside shots. Whether facing you or broadside, bring the shot more toward and in the eye would be better.