What is the structure labeled as $A$ in the given figure made of?

Column $-I$ represents scientists and Column $-II$ represents their discoveries. Choose the correct option:

Column $-I$	Column $-II$
$(A)$ Robert Hooke	$(i)$ Cell Theory
$(B)$ Robert Brown	$(ii)$ Golgi apparatus
$(C)$ Schleiden and Schwann	$(iii)$ Cell
$(D)$ Camillo Golgi	$(iv)$ Nucleus

The contribution of cytoplasmic $DNA$ in cells to total $DNA$ is

Match the following columns:-
List-$I$ List-$II$
$(a)$ Cristae $(i)$ Flat membrane-bound sacs in stroma
$(b)$ Cisternae $(ii)$ Infoldings in mitochondria
$(c)$ Thylakoids $(iii)$ Disc-shaped sacs in Golgi apparatus
$(d)$ Kinetochores $(iv)$ Disc-shaped structures in chromosomes

Nucleic acid $(DNA)$ is $NOT$ found in:

Which of the following is the odd one out?