Basal bodies of cilia and flagella are derived from

Identify the components labelled $A, B, C$ and $D$ in the given section of cilia/flagella showing different parts. Choose the option which shows the correct labelling of parts.

How many microtubule triplets are arranged in the peripheral area of a centriole?

Which organelle consists of two cylindrical structures arranged at right angles to each other?

Which of the following is present in an animal cell?

Which cytoplasmic structures are essential during cell division?