Insufficient blood supply in human body is referred as___________?

Insufficient blood supply in human body is referred as___________?A. Ischemia
B. Hyperemia
C. Hemostasia
D. Hemorrhage

Ischemia or ischaemia is a restriction in blood supply to tissues, causing a shortage of oxygen that is needed for cellular metabolism (to keep tissue alive). Ischemia is generally caused by problems with blood vessels, with resultant damage to or dysfunction of tissue.