Question

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

1️⃣ iron
2️⃣ calcium
3️⃣ copper
4️⃣ zinc​

Answer 1

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.

iron

hope it helps you ❄️

Answer 2

I think the answer is iron pa please mark me as brainlist