Assuming that nitrification will occur, the total theoretical oxygen demand $($sum of carbonaceous and nitrogenous oxygen demand$)$ for a wastewater containing $165m\frac{g}{L}$ of lysine $(C_6{H}_{14}{N}_2{O}_2)$ is most nearly?

A$.145$

B$.165$

C$.253$

D$.325$

E$.398$

An unseeded BOD test is conducted by adding $10\mathrm{.}0mL$ of polluted water to a $300mL$ BOD bottle and filling with dilution water. The initial dissolved oxygen $($DO$)$ concentration was $8\mathrm{.}2m\frac{g}{L}.$ After incubation for $5$ days at $20C,$ the DO was measured to be $2\mathrm{.}9m\frac{g}{L}.$ The $BO{D}_5$ of the polluted water is most nearly?

A$.5\mathrm{.}3{10}^{-2}$

B$.5\mathrm{.}3{10}^0$

C$.5\mathrm{.}3{10}^0$

D$.1\mathrm{.}6{10}^1$

E$.1\mathrm{.}6{10}^2$

F$.2\mathrm{.}1{10}^2$