Which type of chromosome is shown in the figure below?

Different types of chromosomes can be recognised by the position of the following separating the two arms.

The common point of attachment of all the arms of polytene chromosome is known as

Read the following statements $:-$
$(i)$ Centromere is present in the middle of the chromosomes and forms two equal arms.
$(ii)$ Chromosome has a terminal centromere.
$(iii)$ Centromere lies close to the end of the chromosome forming one extremely short and one very long arm.
$(iv)$ Centromere lies slightly away from the middle of the chromosome resulting in one shorter arm and one longer arm.
Select the correct option as per the codes given below $:-$

Polytene chromosomes are formed by

What is the extended arrangement of chromosomes during interphase called?