When a molecule of pyruvic acid is subjected to anaerobic oxidation and forms lactic acid, there is

Question

$\begin{array}{1 1}(A)\;\text{Gain of 2 ATP molecules}\\(B)\;\text{Loss of 3 ATP molecules} \\(C)\;\text{Loss of 6 ATP molecules}\\(D)\;\text{Gain of 3 ATP molecules. }\end{array} $