Match the following columns based on the scale of biological organization and their respective fields of study:

Column $I$ (Scale)	Column $II$ (Biological Entity)	Column $III$ (Field of Science)
$a$. Macroscopic	$P$. Ecosystems	$i$. Physics
$b$. Sub-microscopic	$Q$. Tissues	$ii$. Ecology
$c$. Conceptual	$R$. Organ systems	$iii$. Cell Biology
$d$. Microscopic	$S$. Sub-atomic particles	$iv$. Biology

• A
  $a-R-iv, b-P-i, c-S-ii, d-Q-iii$
• B
  $a-R-iv, b-S-i, c-P-ii, d-Q-iii$
• C
  $a-R-iv, b-S-i, c-P-iii, d-Q-ii$
• D
  $a-Q-iv, b-P-iii, c-R-ii, d-S-i$