The simplification of 1/8 + 18^2 + 18^3 + 18^4 + 18^5 upto three place of decimals yields = ?

Answer: Option A

$$\begin{array}{rl}& \text{According to question,}\\ & \frac{1}{8}+\frac{1}{8^2}+\frac{1}{8^3}+\frac{1}{8^4}+\frac{1}{8^5}\\ & \Rightarrow \frac{1}{8}+\frac{1}{64}+\frac{1}{512}+\frac{1}{4096}+\frac{1}{32768}\end{array}$$
  ⇒ 0.125 + 0.015625 + 0.00195313 + 0.00024414 + 0.0000305175
  ⇒ 0.143