A) A-Interdoublet bridge, B-Central microtubule, C-Plasma membrane, D-Radial spoke
B) A-Plasma membrane, B-Central microtubule, C-Interdoublet bridge, D-Radial spoke
C) A-Plasma membrane, B-Interdoublet bridge, C-Central microtubule, D-Radial spoke
D) A-Plasma membrane, B-Interdoublet bridge, C-Radial spoke, D-Central microtubule