Match the description given in column $I$ with their examples given in column $II$ and choose the correct option.

Column $I$ (Description)	Column $II$ (Example)
$A$. Aquatic respiratory organ	$I$. Skin
$B$. Organ which acts as urogenital duct	$II$. Ureter and opens into the cloaca
$C$. $A$ small median chamber	$III$. Cloaca that is used to pass faecal matter,urine and sperms to the exterior
$D$. $A$ triangular structure	$IV$. Sinus venosus which joins the right atrium and receives blood through vena cava

• A
  $A-I, B-II, C-III, D-IV$
• B
  $A-III, B-IV, C-I, D-II$
• C
  $A-III, B-I, C-II, D-IV$
• D
  $A-I, B-II, C-III, D-IV$ (Note: Correct mapping is $A-I, B-II, C-III, D-IV$)