Explanation:

- Mohini is taller than Nita: Mohini > Nita

- Mohini is not shorter than Sarita: Mohini = Sarita

- Sarita and Malini are of the same height: Sarita = Malini

- Mohini is shorter than Hema: Mohini < Hema

- From these statements: Hema is the tallest.

- Determining the second tallest is challenging as Mohini can be equal to or taller than Sarita/Malini. If Mohini equals Sarita/Malini, she can be second tallest, but if taller, it's clearer she could be second tallest.

- Nita is clearly shorter than Mohini.

- Therefore, it’s not explicitly clear who the second tallest is between Mohini and Sarita/Malini.

Option 4: Cannot be determined

“”