A) \[9:4\]
B) \[2:3\]
C) \[3:2\]
D) \[4:9\]
Correct Answer: D
Solution :
Radius of orbit \[r=0.529\times \frac{{{n}^{2}}}{2}\overset{\text{o}}{\mathop{\text{A}}}\,\] \[\therefore \] \[\frac{{{r}_{2}}}{{{r}_{3}}}=\frac{0.529\times \frac{4}{1}}{0.529\times \frac{9}{2}}=\frac{4}{9}=4:9\]
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