Which of the following are the like fractions?

1. $\dfrac{2}{3}, \dfrac{2}{5}, \dfrac{2}{7}, \dfrac{2}{9}$

2. $\dfrac{2}{3}, \dfrac{3}{4}, \dfrac{4}{5}, \dfrac{5}{6}$

3. $\dfrac{1}{5}, \dfrac{2}{5}, \dfrac{3}{5}, \dfrac{4}{5}$

4. none of these

Which of the following is an improper fraction?

1. $\dfrac{5}{7}$

2. $\dfrac{4}{7}$

3. $\dfrac{7}{7}$

4. $\dfrac{2}{3}$

Which of the following statements is correct ?

1. $\dfrac{2}{3} \gt \dfrac{3}{5}$

2. $\dfrac{2}{3} \lt \dfrac{3}{5}$

3. $\dfrac{2}{3} = \dfrac{3}{5}$

4. $\dfrac{2}{3}$ and $\dfrac{3}{5}$ cannot be compared

The smallest of the fractions $\dfrac{3}{5}, \dfrac{5}{6}, \dfrac{7}{10}, \dfrac{2}{3}$ is

1. $\dfrac{2}{3}$

2. $\dfrac{3}{5}$

3. $\dfrac{5}{6}$

4. $\dfrac{7}{10}$