Which one of following substances in the blood in man imparts the oxygen carrying to it

Which of the following carries oxygenated blood?

Which one of the following in blood absorbs oxygen

Of the following substances the one which does not contain oxygen is

Name the oxygen carrying pigment in blood

Which one of the following is colourless and highly toxic gas which reduces oxygen carrying capacity of blood?

Which one of the following is colourless and highly toxic gas which reduces oxygen carrying capacity of blood?