The correct answer is option 2, Typhoid. Typhoid is not transmitted through blood transfusion.

Option 1, Hepatitis, can indeed be transmitted through blood transfusion. Hepatitis is a viral infection that affects the liver, and certain strains of the hepatitis virus can be present in donated blood.

Option 3, HIV (Human Immunodeficiency Virus), is also known to be transmitted through blood transfusion. HIV weakens the immune system and can lead to the development of AIDS.

Option 4, Malaria, is not typically transmitted through blood transfusion in most cases. However, there have been rare instances where malaria parasites can be transmitted through transfused blood.

In summary, while options 1, 3, and 4 can be transmitted through blood transfusion, option 2, Typhoid, is not typically transmitted via this route.