Question

Which of the following is a rational number?

(a) $\sqrt{5}$

(b) 0.101001000100001........

(c) $\pi$

(d) 0.853853853.....

Answer 1

Since, a number whose decimal expansion is terminating or non-terminating recurring is rational number.
So, 0.853853853... is a rational number.
Hence, the correct option is (d).