Which one of the following is a greenhouse gas?

• Due to the existence of certain gases, including carbon dioxide, methane, nitrous oxide, and fluorinated gases like HFCs, PFCs, and sulfur hexafluoride, the greenhouse effect naturally causes the Earth's surface and atmosphere to warm.
• Chemically, a gas only qualifies as a greenhouse gas if it has the capacity to absorb solar infrared radiation.
• Methane stores the greatest heat compared to carbon dioxide because it absorbs more infrared light, which has the highest heat energy.
• Oxygen is required for all organisms for their survival.  
• Nitrogen is required by plants for their growth.

Hence, option B is the correct answer.