For an elementary reaction $2 A + 3 B \rightarrow 4 C + D$,the rate of appearance of $C$ at time $t$ is $2.8 \times 10^{-3} \ mol \ L^{-1} \ s^{-1}$. The rate of disappearance of $B$ at time $t$ will be:
- A$\frac{4}{3}(2.8 \times 10^{-3}) \ mol \ L^{-1} \ s^{-1}$
- B$\frac{3}{4}(2.8 \times 10^{-3}) \ mol \ L^{-1} \ s^{-1}$
- C$2(2.8 \times 10^{-3}) \ mol \ L^{-1} \ s^{-1}$
- D$\frac{1}{4}(2.8 \times 10^{-3}) \ mol \ L^{-1} \ s^{-1}$
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