Which blood group can be given to patients of any blood group?

What is the primary product of hemoglobin degradation?

Which of the following are erythropoietic organs?
$I$. Liver
$II$. Lymph node
$III$. Spleen
$IV$. White bone marrow
$V$. Red bone marrow
Choose the correct option.

The term $haematocrit$ refers to:

Which of the following blood cells has a kidney-shaped nucleus?

Assertion $(A)$: Blood coagulates in uninjured blood vessels.
Reason $(R)$: Uninjured blood vessels release an anticoagulant heparin.