Statement $P$ : Small disc-shaped structures called kinetochores are present on the surface of the centromeres.
Statement $Q$ : Spindle fibers attach to the centromeres of the chromosomes.

• A
  Both Statement $P$ and $Q$ are true,and Statement $P$ is the correct explanation of Statement $Q$.
• B
  Both Statement $P$ and $Q$ are false.
• C
  Statement $P$ is false and Statement $Q$ is true.
• D
  Both Statement $P$ and $Q$ are true.