The following illustration shows a hypothetical reaction between A (green spheres) and B (white spheres):

Which of the following best represents the reaction above?
(a) A₂ + 3 B₂ → 2 AB₃
(b) 3 A₂ + 9 B₂ → 3 AB₃
(c) A + 3 B → AB₃
(d) 2 A + 6 B → 2 AB₃

• A. A₂ + 3 B₂ → 2 AB₃
• B. 3 A₂ + 9 B₂ → 3 AB₂
• C. A + 3 B → AB₃
• D. 2 A + 6 B → 2 AB₃

Answer: (A)