The figure below is the diagrammatic respesentation o the E.Coli vector pBR 322. Which one of the given options correctly identifies its certain component(s) ? <br>

Question

( A ) ori- original restriction enzyme
( B ) Hind III, EcoRI-selectable markers
( C ) rop-reduced osmotic pressure
( D ) $amp^R , tet^R$ - antibiotic resistance genes