Which two taxa are mentioned in the scientific name of an organism?

Match Column-$I$ with Column-$II$ regarding taxonomic categories of humans and choose the correct answer:

Column-$I$	Column-$II$
$A$. Family	$I$. Primata
$B$. Order	$II$. Hominidae
$C$. Class	$III$. Chordata
$D$. Phylum	$IV$. Mammalia

The study of which of the following is essential for agriculture,forestry,industries,and the conservation of bioresources and their diversity?

What is the taxonomic rank of $Rhizobium$?

Which of the following taxonomic categories contains organisms with the least number of similarities?

Assertion : Taxon and category are different things.
Reason : Category shows hierarchical classification.