What are the values of x, y and z respectively in the following in the following equation? MnO 2(s) + xHCI(aq) → MnCI2(g) + yHO(l) + zCI2(g)

What are the values of x, y and z respectively in the following in the following equation? MnO _2(s) + xHCI_(aq) → MnCI_2(g) + yHO_(l) + zCI_2(g)

The correct answer is D. 4,2,1

No explanation given