Questions: Type AB blood (2/4) Type O blood (4/4) Type B blood (3/4) Type A blood (4/4)

The question appears to be related to blood types and their corresponding antigens and antibodies. Let's analyze the information provided:

1. Amilases antibodies in plasma: This seems to be a typographical error or irrelevant information, as "amilases" are enzymes, not antibodies related to blood types.

2. Anti B antibodies in plasma: This indicates that the blood type could be Type A or Type O, as these blood types have anti-B antibodies.

3. Anti A antibodies in plasma: This suggests that the blood type could be Type B or Type O, as these blood types have anti-A antibodies.

4. No A or B antigens on RBCs: This is characteristic of Type O blood, which has neither A nor B antigens on red blood cells (RBCs).

5. B antigen on RBCs: This is characteristic of Type B blood, which has B antigens on RBCs.

6. A antigen on RBCs: This is characteristic of Type A blood, which has A antigens on RBCs.

Now, let's match these characteristics to the blood types:

• Type AB blood: Has both A and B antigens on RBCs and no anti-A or anti-B antibodies in plasma.
• Type O blood: Has no A or B antigens on RBCs and has both anti-A and anti-B antibodies in plasma.
• Type B blood: Has B antigens on RBCs and anti-A antibodies in plasma.
• Type A blood: Has A antigens on RBCs and anti-B antibodies in plasma.

Based on the information provided:

• Type O blood: Matches with "No A or B antigens on RBCs" and "Anti A antibodies in plasma" and "Anti B antibodies in plasma".
• Type B blood: Matches with "B antigen on RBCs" and "Anti A antibodies in plasma".
• Type A blood: Matches with "A antigen on RBCs" and "Anti B antibodies in plasma".

The answer is:

• Type O blood: No A or B antigens on RBCs, Anti A and Anti B antibodies in plasma.
• Type B blood: B antigen on RBCs, Anti A antibodies in plasma.
• Type A blood: A antigen on RBCs, Anti B antibodies in plasma.

Each blood type is characterized by the presence or absence of specific antigens on the surface of red blood cells and specific antibodies in the plasma.