underset(nrarrinfty)lim (sqrt1+sqrt2+......

`underset(nrarrinfty)lim (sqrt1+sqrt2+.......+sqrt(n-1))/(nsqrtn)` = ?

A

`(5-sqrt(5))/(10)`

B

`(5+sqrt(5))/(10)`

C

`(2+sqrt(3))/(2)`

D

`(2-sqrt(3))/(2)`

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