In the given taxonomic hierarchy diagram, what do "$P$" $\rightarrow$ and "$Q$" $\rightarrow$ represent respectively?

  • A
    "$P$" $\rightarrow$ Increase in the number of species; "$Q$" $\rightarrow$ Decrease in the number of species.
  • B
    "$P$" $\rightarrow$ Decrease in the number of species; "$Q$" $\rightarrow$ Increase in the number of species.
  • C
    "$P$" $\rightarrow$ Increase in the number of organisms; "$Q$" $\rightarrow$ Decrease in the number of organisms.
  • D
    Both $(a)$ and $(c)$.

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