Anatomy question

compared to air in the alveoli, blood in the pulmonary artery contains which of the following?
these are the options:
higher concentrations of oxygen and lower concentrations of carbon dioxide
higher concentrations of oxygen and higher concentrations of carbon dioxide
lower concentrations of oxygen and lower concentrations of carbon dioxide
lower concentrations of oxygen and higher concentrations of carbon dioxide

Put each tile to the correct location. categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. 1) scientific theories 2) both 3) scientific hypothesis a). a tentative statement used to guide scientific investigations b). makes predictions about future events c). can be tested many independent researches d). based on observations of natural phenomena e) . a well-established highly reliable explanation