Why is it important to know a person's rhesus factor before a blood transfusion?
a patient who is rh+ can receive only rh– blood.
a patient who is rh– can receive only rh+ blood.
a patient who is rh+ can receive only rh+ blood.
a patient who is rh– can receive only rh– blood.

The point 4-- A patient who is Rh- can receive only Rh- blood.

Answer;

A patient who is Rh– can receive only Rh– blood.

Explanation; Blood type is determined by two factors; that is the ABO grouping system and the Rh factor. In the case of Rh factor, the presence or absence of the Rh factor determines the type of blood. For example, an individual with rhesus negative and has A type blood, then they are A- negative. It is important to know your blood type to prevent the risk of receiving an incompatible blood type at a time of need, such as during a blood transfusion or during surgery. Additionally, knowing of Rh blood type is important for pregnant women, since a woman who is Rh-negative and pregnant with a baby that is Rh-positive, would have RH-incompatibility.

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