Explanation:

- Vimla starts moving north for 30 m.

- She makes a right turn (east) and walks 40 m.

- She turns left (north) and walks 35 m.

- She turns right (east) and walks another 40 m.

- She takes another right (south) and walks 85 m.

- She turns right (west) and walks 50 m.

- Finally, she turns right (north) and walks 20 m.

Now, let's break down her final position compared to her starting point:

- In north-south direction: 30 m north + 35 m north - 85 m south + 20 m north = 0 m (back to the same north-south level)

- In east-west direction: 40 m east + 40 m east - 50 m west = 30 m east

Therefore, Vimla is 30 m east of her starting point.

- Option 1: 20 m, West

- Option 2: 100 m, East

- Option 3: 30 m, East

- Option 4: 30 m, South