1. This will vary for each person, so you need to ask your family or check medical records. Common blood types are A, B, AB, and O, and each can be Rh-positive (+) or Rh-negative (−).2. Again, this is personal and can be found through a blood test. Knowing your blood type is important for health reasons.3. Knowing your blood type is important in case of emergencies like blood transfusions. It helps doctors avoid giving you the wrong type of blood, which can be dangerous. It’s also useful for pregnancy, organ donation, and medical procedures.