🔬 Biology · Body Fluids and Circulation · NEET

The Rh factor is a type of ___ found on the surface of red blood cells:

Correct answer: A. antigen

Explanation: The Rh factor is an antigen; people with it are Rh-positive.

Concept context

Blood, lymph, the heart, the cardiac cycle, blood pressure, and ECG. High NEET weightage.