I would choose the C option

5balbr.jpg (click to show) If u picked gun

If u picked knife

If u shoot him in the body the bullet repelled from his diamond body and he kills you

If you shoot him in the head

You throw the knife it misses and boomerangs towards you and u get killed

U tried to kill someone with a knife when he is made out of swords. You are so stupid that Sword dude died because he felt sympathy for you. As you both together watch the last sunrise you guys cry. Wow this is getting sad now