Which among the following is least fraction

The correct option is (A).

To find the least fraction the denominators of all the fractions must be same.

To make the denominators of all the fractions same we will multiply the numerators and denominators of all fractions by a suitable number.

$\frac{2\times 1}{8\times 1}=\frac{2}{8}$

$\frac{3\times 2}{4\times 2}=\frac{6}{8}$

$\frac{1\times 4}{2\times 4}=\frac{4}{8}$

$\frac{5\times 2}{4\times 2}=\frac{10}{8}$

Here, $2<4<6<10$

Therefore, $\frac{2}{8}$ is the least fraction.