Does medical air support combustion?

Medical air does indeed support combustion. It is composed primarily of nitrogen and oxygen, with the oxygen content being the key factor in its ability to support combustion. In general, any mixture that contains oxygen will allow for combustion to occur because oxygen is a vital element needed for flames to ignite and sustain. Even though medical air contains less oxygen than pure oxygen, it still has enough oxygen content to support combustion, making its ability to do so true across various scenarios.

The other options would imply a misunderstanding of the nature of air and combustion. For example, stating that medical air only supports combustion in high concentrations would misrepresent how combustion works, as oxygen is always present in sufficient quantities in the air to permit ignition under the right conditions. Thus, the assertion that medical air supports combustion is based on its oxygen content, making it accurate and foundational knowledge for anyone working in a medical setting.