What is the balanced form of the equation CH₄ + O₂ → CO₂ + H₂O?
a. CH₄​+2O₂​→CO₂​+2H₂O
b. CH₄+O₂​→CO₂​+H₂​O
c. 2CH₄+3O₂→3CO₂+4H₂​O
d. CH₄+5O₂→CO₂+5H₂​O