Which one of the following is the most energetic conformation of cyclohexane?

Which of the following represents the correct stability order?

Staggered and eclipsed conformers of ethane are:

Statement $I$: Staggered conformation of ethane is more stable than the eclipsed conformation.
Statement $II$: The torsional strain in staggered conformation is more than in the eclipsed conformation.

With respect to the conformers of ethane,which of the following statements is true?

Different conformations of the same molecule are called