Doctors prescribe blood test for patients to confirm malaria. Blood test is done to :
          

Correct option is C

The correct answer is check for microbes in blood.
A blood test for malaria typically involves checking for the presence of the malaria parasite (Plasmodium) or its byproducts in the patient's blood. This is done to identify the presence of the malarial infection. The test may involve examining blood smears under a microscope or using more advanced laboratory techniques to detect the parasites or their genetic material.
Thus, doctors prescribe blood test for patients to confirm malaria. Blood test is done to check for microbes in blood.