The image shows two molecules (B and C) with identical atoms but different spatial arrangements. Both are meso compounds because they have chiral centers but are achiral overall due to an internal plane of symmetry. This symmetry makes them superimposable on their mirror images.

Key points:

• Both contain chiral carbons.
• Both are achiral molecules.
• Both have identical bond lengths and are meso forms.

Final answer: All the given options are correct for compounds (B) and (C).