Infusion of blood for therapeutic purposes is called

Infusion of blood for therapeutic purposes is calles: "transfussion"

Explanation:

To understand the answer we need to analyze all o them.

a. Culture. It is the way a certain group of people has to behave, believe, think and act as an established pattern. In our case, we are talking about blood for therapeutic purposes, so it's incorrect.

b. transplant. This is the insertion of an alien organ to the patient's body for therapeutic purposes. So it is incorrect.

c. Transfusion. This is the correct answer because transfusion is the technical name given to the act of introducing alien blood to the body to help the patient recover a certain condition.

d. chemotherapy. This is a treatment used to kill fast-growing cells in the body like the cancer ones.

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b and c would be the answers