3.5mm stereo plug to 2.5mm stereo jack FEV-B194

B. 3.5mm stereo plug to 2.5mm stereo jack
C. 3.5mm stereo plug to 3.5mm mono jack
A. 3.5mm stereo plug to 2.5mm mono jack;
B. 3.5mm stereo plug to 2.5mm stereo jack
C. 3.5mm stereo plug to 3.5mm mono jack