Which of the following statements is false regarding SDS-polyacrylamide gel electrophoresis?

Which one among the following primer pairs would amplify the fragment of $\mathrm{DNA}$ given below?

$5^{\text{'}}-\mathrm{CTAGTCGTCGAT}-{\left(\mathrm{N}\right)}_{300}-\mathrm{GACTGAGCTGAGCTG}-3\text{'}$

$3^{\text{'}}·GATCAGCAGCTA-(\mathrm{N}{)}_{300}-\mathrm{CTGACTCGACTCGAC}-5^{\text{'}}$

VNTR is

Assertion (A): The fragments of DNA generated by the action of restriction endonucleases are separated by polyacrylamide gel electrophoresis.

Reason (R)： The separated DNA fragments are visualised as bright orange coloured bands after staining with Ethidium Bromide followed by exposure to $\mathrm{UV}$ - radiation.

Which of the following is true?

Identify the labels $\mathrm{M}$ and $\mathrm{N}$ in the following Agarose gel electrophoresis representation.

Identify the labeled parts $1, 2, 3, 4$ in the given figure?