Question

An assault has been committed, and the victim is bleeding profusely. You do a quick blood test and find the following result. Predict the victim’s blood type by the presence or absence of agglutination.

a. AB-
b. O+
c. AB+
d. O-

Answer 1

From the test results, the victim is O+. The clumping indicates the presence of a rhesus factor.

There are four human blood groups which are;

• A
• B
• AB
• O

A person can have any of these blood groups. Those who have blood group O lack antigens A and B in blood hence they do not agglutinate in a blood test with antibodies A and B.

Also, the fact that there is clumping in the rhesus test indicates that the blood is rhesus positive.

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