The forces holding molecules of iodine together in the solid state are

Explanation

Iodine molecules are non polar, so the only attraction available is the temporary induced dipole force, which nonetheless grows large enough in such a heavy molecule to make iodine a solid at room temperature. The strong covalent bond inside each molecule is not broken when the solid sublimes. This distinction between intramolecular and intermolecular forces is the point of the question.