The correct answer is c) Anti-staggered > Skew or Gouche > Partially Eclipsed > Fully Eclipsed
EXplaination ::
The isomers which can be produced by the free rotation about single bond are known as conformation /Rotamers/ Rotational isomers and this phenomenon is called as conformational analysis
In conformational analysis (energetics study of different rotational conformers or rotamers), structures are represented by *Newman projection * (atoms and bonds are viewed along the axis of rotation).
