Question

Consider the following statements about haemoglobin and select the correct answer from the code even below:

1. It contains iron
2. It imparts red colour to the blood
3. It provides immunity against certain diseases
4. It is a carrier of oxygen in blood

Code:

1. 1, 2 and 3
2. 2, 3 and 4
3. 1, 2 and 4
4. 1, 2, 3 and 4