Q 1115301260.     Let `L=lim_(x->0)(a-sqrt(a^2-x^2)-x^2/4)/x^4,a`>`0.` If `L` is finite,then

JEE 2009
A

`a=2`

B

`a=1`

C

`L=1/64`

D

`L=1/32`

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