Which one of the following molecules is chiral?

Step-by-step solution

A molecule is chiral if it lacks a plane of symmetry (POS) and a center of symmetry (COS). Let us analyze the given structures, which are 1,3-dioxane derivatives. Option (1): The substituents on the ring are arranged such that there is no plane of symmetry passing through the molecule. Specifically, the methyl groups at positions 4 and 6 are trans to each other (one is wedge, the other is dash relative to the general ring plane if drawn flat). There is no POS and no COS. Thus, the molecule is chiral. option (2): Th