The correct answer is (a) U.S.A.
In 2019, scientists at the University of California, San Diego developed a synthetic blood that is a kind of plastic blood which could be given to any patient regardless of his blood group. The blood is made from a type of plastic called polyethylene glycol, which is commonly used in medical devices. The plastic is mixed with hemoglobin, the protein that carries oxygen in blood, and other blood components. The resulting blood is able to carry oxygen and other nutrients to the body’s tissues, and it can be given to patients of any blood type.
The development of synthetic blood could revolutionize blood transfusions. Currently, blood transfusions are limited by the availability of blood from donors. Synthetic blood could provide a safe and reliable source of blood for patients who need transfusions.
The development of synthetic blood is still in its early stages, but it has the potential to save lives. The blood is currently being tested in animals, and it is not yet clear when it will be available for human use.
The other options are incorrect because they do not identify the country where the synthetic blood was developed.