Answer:
Neutrophils
Explanation:
In the given question, after the arm of the person got scrapped by the concrete which injured the skin of the person.
For the body, the scrapping of the body could have allowed the microorganism to invade and the immune system could have been activated. The immune cells which continuously flows in the lymph and blood are the white blood cells which are or five types.
When the smear of the blood is observed then the cells with large nucleus were observed which are the neutrophils, the most abundant white blood cells in the body.
Thus, Neutrophils is correct.