Classify each of these molecular orbital representations as constructed from two s atomic orbitals or two p atomic orbitals.

• A. (i) Two s atomic orbitals
  (ii) Two s atomic orbitals
  (iii) Two s atomic orbitals
• B. (i) Two s atomic orbitals
  (ii) Two p atomic orbitals
  (iii) Two p atomic orbitals
• C. (i) Two s atomic orbitals
  (ii) Two p atomic orbitals
  (iii) Two s atomic orbitals
• D. (i) Two p atomic orbitals
  (ii) Two p atomic orbitals
  (iii) Two s atomic orbitals

Answer: (D)