If \( a b-b+1=0 \) and \( b c-c+1=0 \), then the value of (W) \( a-a c \) is (a) 1 (b) 0 (c) 2
If \( a b-b+1=0 \) and \( b c-c+1=0 \), then the value of
(W) \( a-a c \) is
(a) 1
(b) 0
(c) 2
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