$PCR$ (Polymerase Chain Reaction) is used for the diagnosis of which of the following diseases?

Match the columns:

Column-$I$	Column-$II$
$(a)$ Lysozyme	$(i)$ Fat
$(b)$ Cellulase	$(ii)$ Protein
$(c)$ Chitinase	$(iii)$ Bacteria
$(d)$ Lipase	$(iv)$ Fungi (Penicillium)
	$(v)$ Plant (Mangifera indica)

Gel electrophoresis is used for:

Study the following diagram of the Polymerase Chain Reaction $(PCR)$ and identify $A, B$ and $C$.

Given below are two statements.
Statement $I$ - The isolated $DNA$ of donor organism is cleaved by suitable restriction endonuclease to form $DNA$ fragments with cohesive staggered or blunt ends.
Statement $II$ - The foreign $DNA$ or passenger $DNA$ can also be obtained directly from genomic or cDNA library.
In the light of above statements,select the correct option given below:

The technique of bombarding plant cells with high velocity microparticles of gold or tungsten,coated with $DNA$,is known as: