Hierarchical classification means

Which of the following is incorrect regarding the rules of nomenclature?

From .........,various geographical areas,flora,and fauna can be prepared.

Assertion $(S)$: Carolus Linnaeus is known as the father of taxonomy.
Reason $(R)$: Linnaeus proposed the binomial nomenclature system and conducted extensive studies in classification.
$(A)$ Both $S$ and $R$ are true,and $R$ is the correct explanation of $S$.
$(B)$ Both $S$ and $R$ are true,but $R$ is not the correct explanation of $S$.
$(C)$ $S$ is true and $R$ is false.
$(D)$ $S$ is false and $R$ is true.

Which of the following is less general in characters as compared to genus?

When is a rank called a taxonomic category?