Consider the sets I, II and III. Identify the set(s) which is (are) correctly matched. I. Staggered ethane > eclipsed ethane ......... torsional strain. II. 2, 2-Dimethylbutane > 2-methylpentane ......... boiling point III. cis-But-2-ene > trans-But-2-ene ......... dipole moment

• A

  I, II only
• B

  II, III only
• Correct answer
  C

  III only
• D

  I, II, III

Hence, the correct answer is option: 'C'.