The $pH$ of human blood is:

The universal recipient blood group is

If glucose is to be injected into human blood,the property that must be matched with blood is

During the process of blood clotting,what does Vitamin $K$ help in?

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.

After checking the blood groups of a husband and wife, a doctor advised them not to have more than one child. Which of the following could be the blood group combination of the couple?