Final answer:
The given reaction involves methane and oxygen as reactants, and carbon dioxide and water as products. The statement that is not true is that methane is a product.
Step-by-step explanation:
The given reaction is: 2 CH₄ + 3 O₂ → 2 CO₂ + 4 H₂O
In this reaction, methane (CH₄) and oxygen (O₂) are the reactants, while carbon dioxide (CO₂) and water (H₂O) are the products.
Therefore, the statement that is not true about the reaction is c. Methane is a product.