See the section of cilia / flagella showing the different parts
In which of the following options all the four blanks A, B, C and D are correctly identified

Options

A. A – Plasma membrane, B – Interdoublet bridge, C – Hub, D – Arm
B. A – Plasma membrane, B – Interdoublet bridge, C – Hub, D – Radial spoke
C. A – Plasma membrane, B – Arm, C – Central microtubule, D – Radial spoke
D. A – Plasma membrane, B – Interdoublet bridge, C – Central microtubule, D – Radial spoke

Answer

D

Explanation

The cilia and flagella are enclosed by a unit membrane which is an extension of the plasma membrane of the cell.
* The axoneme is generally connected to surrounding plasma membrane by filaments called membrane links.
* It consists of a doublet arranged in the periphery which is joined to one another by interdoublet links.
* From each A subunit of doublet radial spoke arises near the central sheath.