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If the average life time of an excited s...

If the average life time of an excited state of hydrogen is of the order of `10^(-6)` s estimate how may orbits an electron makes, whenit is the state n=2 and before it suffers a transition to state n=1 (Bohr radius `r_(0) = 5.3 xx 10^(11)`m)

A

`2.28 xx 10^6`

B

`22.8 xx 10^6`

C

`8.23 xx 10^6`

D

`2.82 xx10^6`

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