Choose the correct statements from the following
A. $\mathrm{Mn}_2 \mathrm{O}_7$ is an oil at room temperature
B. $\mathrm{V}_2 \mathrm{O}_4$ reacts with acid to give $\mathrm{VO}_2^{2+}$
C. CrO is a basic oxide
D. $\mathrm{V}_2 \mathrm{O}_5$ does not react with acid
Choose the correct answer from the options given below :
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