Which protein present in red blood cells is responsible for the transportation of oxygen?

Q. The protein found in blood that is responsible for transporting oxygen is:

Q. Red blood cells help in transporting oxygen to all parts of the human body.

Q. There are several kinds of cells in the human blood. Which one is responsible for transport of oxygen?

Q. Blood is not responsible for transport of oxygen and nutrients to all the cells.

Q. Which cells are responsible for transporting oxygen and nutrients to body cells?