Which enzyme is known as molecular scissors?

Given below are two statements:
Statement $I:$
Restriction endonucleases recognise specific sequences to cut $DNA$,known as palindromic nucleotide sequences.
Statement $II:$
Restriction endonucleases cut the $DNA$ strand a little away from the centre of the palindromic site.
In the light of the above statements,choose the most appropriate answer from the options given below:

The method for separating $DNA$ fragments is . . . . . . .

The first restriction enzyme to be isolated and characterised was

Match the correct pair:

In vector $\text{pBR-322}$,the $\text{Rop}$ codes for the $:-$