See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

H3 CH OH COOH 2 Lactic acid  O O O O C H3 H CH3 H A cis O O O O C H3 H H CH3 B trans B is optically inactive due to the presence of a point of symmetry. A is optically active, but it is having a C2 axis, thus, it is dissymmetric. 30. Meq. of oxalic acid = 250 40