The questions that keep you up at night

B, you're trying to sever the brain from the body, not the neck

Also Argentinasauruses are like worms. If you leave too much of the neck attached it'll survive and grow a new body.

I'd go with B for obvious reasons

It's far from obvious
I'd bisect the neck
- On which axis?
No way, I'd go for A. Wouldn't want that long neck wriggling about after the cut.
- Why not just use two guillotines so you can do a and b. Best of both worlds.
Just nip the tip!

As a French, I can offer my expertise on Guillotine executions : it's B

Maybe it depends where you would cut a human head of? In either way here is the skeleton of a Argentinosaurus:

Alright! Now we can really start diving in. Would the gaps between vertebrae get larger at the base of the neck compared to the base of the skull? I'd imagine those thick bones could pose a problem for a guillotine blade.
That looks like a way too small heart for such a huge body. It looks only about 3-4 times bigger than human heart
- Oh, is that what that is? Thank you!
- Wasn't there a significantly higher concentration of oxygen 65 million years ago or something? That might make it easier for big things to get enough oxygen for aerobic processes.
  I don't know shit about fuck with chemistry and biology it just sounds right
I'm not seeing a human head on the dinosaur tho
this is a much better skeleton of Argentinosaurus

B but I also wouldn' use that guillotine, I'd use the 300ton one that the US government has for decapitating B52s

This makes me sad for the poor Argentinasaurus

I would say B. Also, you would need a bigger basket for the head to fall into and probably a few more people on hand if you wanted to lift the head up to display to the crowd.

A because its a smaller one and therefore easier to decapitate.

B, obviously

I feel weirdly uncomfortable with both and I would choose c) in the middle of the neck And I am not sure how to view you as a human being if your perception differs

Why not both.

Look at the picture like : BABABABABABABABABABA ... To unlock a new power

You guys don't understand, you're supposed to make slices from a to b