Find the correct match.

$I$	$II$	$III$
$(a)$ $PCR$	$(i)$ Specific base sequence	$p.$ $Taq$ polymerase
$(b)$ Downstream processing	$(ii)$ Inheritable gene	$q.$ Ampicillin resistant
$(c)$ Restriction endonuclease	$(iii)$ Amplification of $DNA$	$r.$ $E. coli$
	$(iv)$ Product separation and modification	$s.$ Quality control

• A
  $a-iii-s, b-i-q, c-ii-r$
• B
  $a-ii-r, b-iii-p, c-i-s$
• C
  $a-iii-p, b-iv-s, c-i-r$
• D
  $a-i-s, b-ii-p, c-iii-r$