I thinking A. or B. but im sure it one of them. that's a 50% chance.
The answer is a black mamba.
The black mamba is predator typically found in central Africa. Not only that its scales are black but also an interior of its mouth. It moves very quickly and at any sudden movement, it is ready to slay its opponents through a rapid application of venomous strikes. <span>Its venom is highly toxic and it could kill a man for 10-15 hours after the bite if antivenom is not applied.</span>
The answer is:
<u><em>A) Methane</em></u>
because if u picked anything else the reaction would not happen