Which of the following is an enantiomer of the given molecule?
 

1.  2.
3. 4.

Hint: Enantiomers are a non-superimposable mirror image

Explanation:

The stereoisomers which are depicted as non-superimposable mirror images are called enantiomers. Enantiomers show similar types of physical properties. Hence both differ in terms of just opposite rotation of plane polarised light.

If one of the enantiomers is laevorotatory then the other will be just the opposite as dexo rotatory. Here, the enantiomer

of the molecule (A) is shown below

So the correct option is  (1).