In which process is nucleic acid synthesized from nucleic acid?

What is the correct chronological sequence of the following events?
$1.$ Formation of the chromosome theory of heredity
$2.$ Experiments which proved that $DNA$ is the hereditary material
$3.$ Mendel's laws of inheritance discovery
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The given figure shows the structure of a nucleosome with its parts labelled as $A, B$ and $C$. Identify $A, B$ and $C$.

Match the following columns correctly.

Column $I$	Column $II$
$(a)$ $m-RNA$	$(i)$ Found in ribosomes
$(b)$ $t-RNA$	$(ii)$ Carries information from $DNA$ to the cytoplasm for protein synthesis
$(c)$ $r-RNA$	$(iii)$ Contains $75$ nucleotides
$(d)$ $RNA$	$(iv)$ $A$ polynucleotide chain containing ribose sugar and uracil base,existing in three types

Given below are two statements:
Statement $I$: Transfer $\text{RNAs}$ and ribosomal $\text{RNA}$ do not interact with $\text{mRNA}$.
Statement $II$: $\text{RNA}$ interference $\text{(RNAi)}$ takes place in all eukaryotic organisms as a method of cellular defence.
In the light of the above statements,choose the most appropriate answer from the options given below.

Which of the following organisms has been used for genetic research?