Match the names of branches of biology listed under column $I$ with the field of study given under column $II$; choose the answer which gives the correct combiantion of the alphabets of the two columns
Column $I $ Column $ II$
(Branch of biology) (Field ofstudy)
$A$ Palynology $p$ Silkworms
$B$ Oncology $q$ Pollens
$C$ Phycology $r$ Cancer
$D$ Sericulture $s$ Algae
