Iodine is :

Iodine is found to be a non-metallic, dark-gray/purple-black, lustrous, solid element. Iodine is found in the halogen family of the periodic table. Metals dominate the periodic table of elements. These contain transition metals, lanthanides, actinides, alkaline earth metals, and alkali metals. On a periodic table, a line running from carbon to radon separates metals from nonmetals. Phosphorus, selenium, and iodine are the elements that are sandwiched between them. Iodine is a solid, non-metallic, dark-gray or purple-black substance. As indicated above, iodine possesses most of the characteristics of a nonmetal since it belongs to the halogen family in the periodic table. ∴ It is shiny because it is non-metal. The elasticity of metals is high. For sound to travel at fast speeds, it has to be elastic. The wavelengths of numerous oscillation modes are often measured in centimetres on the scales where we live; these sounds can easily have audible frequency.

Iodine is a Lustrous non-metal.

Hence, option (A) is correct.