A) \[\frac{5}{2}\]
B) \[\frac{2}{10}\]
C) \[\frac{5}{10}\]
D) \[\frac{3}{10}\]
Correct Answer: A
Solution :
\[\frac{3}{4}\times \frac{4}{3}=1\]Similarly, \[\frac{2}{5}\times ?=1\] \[\Rightarrow ?=1\times \frac{5}{2}=\frac{5}{2}\]
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