The compression ratio (r) of dual cycle is equal to _________

• A. r = volume of the cylinder at the beginning of the compression/volume of the cylinder at the end of the compression
• B. r = volume of the cylinder at the end of the compression/ volume of the cylinder at the beginning of the compression
• C. r = clearance volume/ volume of the cylinder at the beginning of the compression
• D. r = volume of the cylinder at the end of the compression/clearance volume