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If `f(x) = |[x+a,x+2,x+1],[x+b,x+3,x+2],[x+c,x+4,x+3]|` and `a - 2b + c = 1` then

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If `f(x) = |[x+a,x+2,x+1],[x+b,x+3,x+2],[x+c,x+4,x+3]|` and `a - 2b + c = 1` then
A. f(50)=1
B. f(-50)=501
C. f(50)=-501
D. f(-50)=-1
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Correct Answer - `A`
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