If f:R to R is defined by f(x)={{:(,(x-2...

If `f:R to R` is defined by `f(x)={{:(,(x-2)/(x^(2)-3x+2),"if "x in R-(1,2)),(,2,"if "x=1),(,1,"if "x=2):}`
`"then " underset(x to 2)lim (f(x)-f(2))/(x-2)=`

A

0

B

`-1`

C

1

D

`-1/2`

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The correct Answer is:

B

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