Answer:
Correct option: d.Man and Rhesus monkeys only
Explanation:
Rh factor, also known as the Rhesus factor, is a type of protein that is found on the outside of red blood cells. This protein is genetically inherited, i.e., passed down from your parents. If the blood has the protein, it is said to be Rh-positive and if the blood lacks the protein, it is said to be Rh-negative. The Rh factor was first discovered by Landsteiner and Weiner and was named after Rhesus monkey as it was first found in the blood. The retrieved antibodies also agglutinated blood of some people, which led to the discovery of the presence of the Rh blood group system in humans and Rhesus monkeys.
