If a, b, c are non - zero a + 1/b = 1 and b + 1/c = 1, then the value of abc is?

Answer: Option A

$$\begin{array}{rl}& a+\frac{1}{b}=1,b+\frac{1}{c}=1\\ & \text{Values of }a,b,c\text{ assume}\\ & a=\frac{1}{2}\\ & b=2\\ & c=-1\\ & \therefore abc\\ & =\frac{1}{2}\times 2\times -1\\ & =-1\end{array}$$