Absolutely correct. You dont need any more help there :) The first and second are enantionmers (non superimposable object-image pairs) Same with the 3rd and 4th. Just imagine a mirror and things would seem simpler to you. :) What are not enantiomers are diastreomers. And you have written so correctly. Solution Absolutely correct. You dont need any more help there :) The first and second are enantionmers (non superimposable object-image pairs) Same with the 3rd and 4th. Just imagine a mirror and things would seem simpler to you. :) What are not enantiomers are diastreomers. And you have written so correctly..