Which of the Following Statements About the Conformers That Result

Multiple Choice

Which of the following statements about the conformers that result from rotation about the C2-C3 bond of butane is correct?

A) The highest energy conformer is one in which methyl groups are eclipsed by hydrogens.
B) The gauche conformer is an eclipsed one.
C) Steric strain is absent in the eclipsed forms.
D) Torsional strain is absent in the eclipsed forms.
E) none of the above