MCQ
$X$ and $Y$ respectively are


- A

- B

- ✓

- D








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${\log _{10}}\,\left[ { - \frac{{d\left[ A \right]}}{{dt}}} \right] = {\log _{10}}\,\left[ {\frac{{d\left[ B \right]}}{{dt}}} \right] + 0.3010$
$‘A’$ and $‘B’$ respectively can be