Biosensor is used to measure?

A. Blood glucose level
B. The body pH value
C. Amount of hemoglobin
D. Salinity in Urine
A biosensor is a sensor exploiting a biomolecule and is used to measure the presence of a certain substance in a liquid. For example, the medical world uses biosensors to detect a virus in the blood or to measure glucose levels in blood. These are mainly point-of-care applications, where direct results are important.