Please check my answers, I have 2 different answers and I'm not sure which is the correct one?

Please check my answers, I have 2 different answers and I'm not sure which is the correct one?I was comparing answers with a friend and out of 50 questions, we had 6 of them that were different from eachothers answers. Even if you don't know all, can you please help me with the ones that you do know?

Which white blood cells are phagocytes?
a) monocytes
b) T lymphocytes
c) B lymphocytes
d) all of the above

I put A, but my friend put D

2. In order for thrombin to be formed:
a) fibrinogen must be present
b) sodium must be present
c) potassium must be present
d) calcium must be present

I put D for this one, but my friend put A

3. Vitamin K stimulates the liver to increase productin of
a) prothrombin activator
b) fibrinogen
c) prothrombin
d) thrombin

I put C, but my friend put A

4. The blood type with no antigens on the blood cell and both anti-A and anti-B antibodies in the plasma is:
a) type AB
b) type O
c) type A
d) type B

I put B, but my friend put A

5. A patient with thicker-than-normal buffy coat may have:
a) an infection
b) leukemia
c) leukopenia
d) both A and B above

I put D, but my friend put B

6. A patient with a thiner-than-normal buffy coat may have:
a) an infectin
b) leukemia
c) leukopenia
d) both A and B above

I put C, but my friend put D

Answer by Apu D
the corects answers are
1-C
2-D
3-A (I'm not very sure here)
4-A (or may be B, I forgot)

Know better? Leave your own answer in the comments! Information about multiple myeloma and other plasma cell neoplasms.

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