Question 1574 Deck General

The correct answer is A) suffocate. Exposure to a 100% methane atmosphere for more than 15 minutes would result in suffocation and death. Methane is an asphyxiant gas, meaning it displaces oxygen in the air and can lead to rapid unconsciousness and death by oxygen deprivation. At 100% concentration, there would be no oxygen available to breathe, leading to rapid asphyxiation. The other options are incorrect - methane is not toxic, does not cause cryogenic rashes, and does not burn. Suffocation is the only likely outcome of prolonged exposure to a pure methane atmosphere.