What is the disc-shaped structure found on the surface of the centromere called?

Non-membranous nucleoplasmic structures in the nucleus are the site for active synthesis of:

Match column-$I$ with column-$II$ and choose the correct option.

Column-$I$ (Chromosome)	Column-$II$ (Position of Centromere)
$A$. Metacentric	$I$. At the tip
$B$. Submetacentric	$II$. Almost near the tip
$C$. Acrocentric	$III$. At the middle
$D$. Telocentric	$IV$. Slightly away from the middle

The Feulgen reaction is used for the staining of which of the following?

Which of the following statements is correct for a submetacentric chromosome?

The given diagram shows a chromosome. Which of the following data refers correctly to the chromosome?
No. of Centromere - No. of Kinetochore - No. of Arms