GENERAL KNOWLEDGE

Detailed explanation-1: -It has been mentioned that seaweeds could be an important route to transfer iodine to the atmosphere. Thus, the correct option is C. i.e. Iodine.

Detailed explanation-2: -Potassium iodide is absorbed and excreted at different rates in the body (Combet et al, 2014) that chelated (seaweed) iodine. As only 37% of seaweed iodine is absorbed, you can consume roughly three times as much to get the same absorption rate as you would in a potassium iodide supplement.

Detailed explanation-3: -Iodine Content in Edible Seaweeds. Marine algae have long been known as an important source of iodine. Seaweed can enrich iodine due to a higher concentration factor compared with terrestrial plants.