Which of the following equations follows the law of conversation of mass a. 3h2o > 3h2 + 3o2 b. c + 4h2 > ch4 c. c2h4 + 3o2 > 2co2 + 2h2o d. 2na + cl > nacl

Option C. is correct

Calculate no. of each element on the reactant side and no. of elements on products side; If no. of elements in reactant = product,
then the reaction follows Law Conservation of Mass.

If you explain it more through i will answer it : )