Select the single best answer. Classify the pair of compounds as constitutional isomers or stereoisomers. and stereoisomers constitutional isomers A molecule is achiral if it has a plane of symmetry in any conformation. The given conformation of 2,3-dibromobutane does not have a plane of symmetry, but rotation around the C2-C3 bond forms a conformation that does have a plane of symmetry. Select this conformation. Select the single best answer. Сн, H Br C Bp.c H сн. BE Н. --- Br HC CH нс CH B CH CH Br Hoc өсіру BI H