In which step of $DNA$ profiling,nitrocellulose membrane is used?

What is it that forms the basis of $DNA$ fingerprinting?

Which technique is used for $DNA$ fingerprinting?

Which process is used for amplification or multiplication of $DNA$ for fingerprinting?

Select the option that shows the correct sequence of the $DNA$ fingerprinting process.
$(i)$ Isolation of $DNA$
$(ii)$ Hybridization using labeled $VNTR$ probe
$(iii)$ Transfer of $DNA$ fragments to nylon membrane
$(iv)$ Separation of $DNA$ fragments by electrophoresis
$(v)$ Autoradiography
$(vi)$ Digestion of $DNA$ by restriction endonucleases

During $DNA$ fingerprinting,the $ds$-$DNA$ splits into $ss$-$DNA$ by . . . . . . treatment.