The correct option is C Presence of a combustible substance and a medium for combustion
For combustion to take place, the following conditions should be met:
1. There should be a combustible substance
2. There should be a medium in which combustion can take place
3. The ignition temperature of the combustible substance should be attained
Carbon dioxide is non-combustible and non-supporter of combustion. Hence its presence will not let combustion reaction to proceed.