C-Size of the largest particle that can be removed is a measure of air filter efficiency.
Air filter efficiency is a measure of how effectively a filter removes particles from the air. It can be measured in various ways, depending on the type of filter and the particles it is designed to remove.
A-Total volume of dirt collected - This measure does not provide information about the efficiency of the air filter, it could be a measure of how long the filter has been in use.
B-Total weight of dirt collected - This measure does not provide information about the efficiency of the air filter, it could be a measure of how long the filter has been in use.
C-Size of the largest particle that can be removed - This measure provides information about the efficiency of the air filter, because it tells us the size of the largest particle that the filter can remove. The smaller the particle size, the more efficient the filter is.
D-Total weight of the particles that can be removed - This measure does not provide information about the efficiency of the air filter, it could be a measure of how long the filter has been in use.
Air filter efficiency is usually measured by the Minimum Efficiency Reporting Value (MERV) rating, which is a standard measurement scale that ranges from 1 to 16, the higher the MERV rating, the more efficient the filter is at capturing small particles.