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Let f: `R to R` be a continuous function. Then `lim_(x to pi//4) (pi/4 int_2^(sec^2x) f(x)dx)/(x^2 - pi^2/16)` is equal to :

A

`f(2) `

B

`4f(2)`

C

`2f(sqrt2)`

D

`2f(2)`

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