Question

28 the mineral which is an important component of hemoglobin, the substance in red blood cells, is.. a iodine b sodium c calcium d iron

Explanation:

Hemoglobin is a protein in red blood cells that carries oxygen. Iron is an essential mineral for the formation of hemoglobin. Iodine is important for thyroid function, sodium is involved in fluid balance and nerve function, and calcium is crucial for bone health and muscle function.

Answer:

D. iron