Question

*An ______ containing protein-hemoglobin is present in the Red Blood Cells of blood.*

1️⃣ iron
2️⃣ calcium
3️⃣ copper
4️⃣ zinc​

Answer 1

Answer:

Iron is the correct answer

Explanation:

Hope this is helpful to you

Answer 2

Answer:

Hemoglobin, also spelled haemoglobin, iron-containing protein in the blood of many animals—in the red blood cells (erythrocytes) of vertebrates—that transports oxygen to the tissues.

Explanation:

answer is iron