Choose the best option to transform into a 'Complex' sentence
This dress is not as pretty as the one I bought from Shimla.
1
That dress which I bought from Shimla is the prettiest than this one.
2
That dress which I bought from Shimla is prettier than this one.
3
That dress which I bought from Shimla is not as prettier than this one.
4
That dress which I bought from Shimla is prettier than these ones.