Solute concentration
is higher outside the
cell causes the cell
shrink.

If these are your answer choices -

A. Hypertonic solution

B. Isotonic solution

C. Hypotonic solution

D. Both A and C

then your answer is:

Correct option is - A

Hypertonic solution

A hypertonic solution is a particular type of solution that has a greater concentration of solutes on the outside of a cell when compared with the inside of a cell. Water crosses the cell membrane in both directions, but more water leaves the cell than enters it. Therefore, the cell will shrink due to exosmosis.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

yes, because even though a theory has a  lot of evidence to support it, it is not always true