Which one of the following substances in the blood in man imparts the oxygen carrying capacity to it?

When red blood corpuscles containing both $A$ and $B$ antigens are mixed with your blood serum,they agglutinate. Hence,your blood group is . . . . . . type.

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

With reference to the blood in a normal person,which one of the following statements is correct?

An abnormal rise in the number of $R.B.C.$ is called:

In mammalian $RBC$,the percentage of haemoglobin is