Match Column 1 with Column 2 :

A-ii B-iii C-iv D-i

The correct answer is Option (4) - A-ii B-iii C-iv D-i

Restriction enzymes are named after the bacterial species from which they are originally isolated, and the Roman numeral is used to distinguish different enzymes isolated from the same species.

The convention for naming these enzymes is the first letter of the name comes from the genus and the second two letters come from the species of the prokaryotic cell from which they were isolated, e.g., EcoRI comes from Escherichia coli RY 13. In EcoRI, the letter ‘R’ is derived from the name of strain. Roman numbers following the names indicate the order in which the enzymes were isolated from that strain of bacteria.